Shen Zhen WFLY Technology Development WFT09II RADIO CONTROL SYSTEM User Manual

Shen Zhen WFLY Technology Development Co., Ltd. RADIO CONTROL SYSTEM Users Manual

USERS MANUAL 1

INSTRUCTION MANUALRADIO CONTROL SYSTEM PCMS 4096NOTICERead the instruction before operation!V2PCMS Receiver, Dual MCU, Dual Antenner.Dual circuits1
INSTRUCTIONThank you for purchacing         product!SERVICE1.Retailers to provide free maintenance for six months (apart from  artificial  damage)2. WFLY retailers will always provide life-long maintance  2
CATALOGUEContents-------------------------------------------------------------------- Transmitter front-----------------------------------------------------------     Transmitter back-----------------------------------------------------------   Receiver---------------------------------------------------------------------    Trainer function------------------------------------------------------------   Flying safety warnings---------------------------------------------------- Features--------------------------------------------------------------------- Buttons---------------------------------------------------------------------- 2.4G Code matching------------------------------------------------------Adjust the stick head-----------------------------------------------------C ----------------------------hange the throttle direction of mode1 or  21. Model selecting--------------------------------------------------------- 2. Model name------------------------------------------------------------3. Model setting-----------------------------------------------------------   4. ATL-----------------------------------------------------------------------   5. Modulation setting----------------------------------------------------- 6. RF setting------------------------------------- ------------ --------------7. Swash select------------------------------------------------------------   8. Stick setting-------------------------------------------------------------    9. Adjustment--------------------------------------------------------------- 10 e.Res t setting--------------------------------------------------------------   11. Send data--------------------------------------------------------------   12. Receive data----------------------------------------------------------    13. Sound------------------------------------------------------------------- 14. Contrast setting-------------------------------------------------------  About-----------------------------------------------------------------------    Language---------------------------------------------------------------  1. Monitor-------------------------------------------------------------------    2. Dual rate & Exponential-----------------------------------------------    3. Servo reverse-----------------------------------------------------------    4. End point---------------------------------------------------------------- INSTRUCTIONHELICOPTERSYS SETTINGNORMAL SETTING080910111213141516171823242526272728293031323334353536373839403
     5. Sub trim----------------------------------------------------------------      6. Swash param setting------------------------------------------------        7. Auxiliary channels setting------------------------------------------        8. Throttle curve setting------------------------------------------------        9. Pitch curve setting---------------------------------------------------       10. Revolution mixing---------------------------------------------------       11. Trim step setting-----------------------------------------------------        12. Throttle cut setting--------------------------------------------------       13. Fly model switch-----------------------------------------------------       14. Throttle holding setting---------------------------------------------     15. Fail safe---------------------------------------------------------------     16. TIMER-----------------------------------------------------------------           (1). GYRO sens setting---------------------------------------------           (2). Throttle hovering setting--------------------------------------             (3). Pitch hovering setting------------------------------------------             (4). HI/LO PIT Setting-----------------------------------------------             (5). Trim offset setting----------------------------------------------             (6). DELAY------------------------------------------------------------             (7). Governor mixing------------------------------------------------             (8). Swash and THR mixing----------------------------------------           (9). Cuve setting-----------------------------------------------------             (10). PROG.NOR.MIX1-7------------------------------------------             (17). PROG.CUR.MIX1-4------------------------------------------             (21). Throttle needle mixing---------------------------------------             (22).Code matching----------------------------------------------INSTRUCTIONADVANCED414243444648495051525354565758596061626364676869694
INSTRUCTIONAIRPLANESYS SETTING1.Model selecting---------------------------------------------------------- 2.Model name--------------------------------------------------------------   3.Model setting------------------------------------------------------------   4.ATL------------------------------------------------------------------------     5.AIL-2----------------------------------------------------------------------   6.Modulation setting------------------------------------------------------   7.RF setting-------------------------------------- ---------   -----------------8.Stick setting-------------------------------------------------------------9.Adjustment- ------------------------------------------------------------10.Reset setting----------------------------------------------------------- 11.Send data-------------------------------------------------------------- 12.Receive data---------------------------------------------------------- 13.Sound------------------------------------------------------------------14.Contrast setting--------------------------------------------------------About----------------------------------------------------------------------- Language------------------------------------------------------------------ NORMAL SETTING1.Monitor------------------------------------------------------------------- 2.Dual Rate & Exponential Setting-------------------------------------   3.Servo Reverse----------------------------------------------------------   4.End Point----------------------------------------------------------------     5.Sub Trim-----------------------------------------------------------------    6.Auxiliary Channels Setting-------------------------------------------   7.Throttle Curve Setting------------------------------------------------ 8.Trim Step Setting------------------------------------------------------- 9.Flaperon----------------------------------------------------------------- 10.Flap Trim--------------------------------------------------------------- 11.Ail-diff------------------------------------------------------------------- 12.Elev-flap---------------------------------------------------------------   7374757677787980818283848585858687888990919294959697985
INSTRUCTION13.Throttle Cut Setting--------------------------------------------------   14.Idle Down--------------------------------------------------------------   15.Fail Safe---------------------------------------------------------------   16.Timer-------------------------------------------------------------------    17.Advanced-------------------------------------------------------------- (1).curve Setting---------------------------------------------------------- (2)-(8).PROG.NOR.MIX1-7----------------------------------------------   (9)-(12).PROG.CUR.MIX1-4--------------------------------------------   (13).Air Brake--------------------------------------------------------------     (14).Elevon-----------------------------------------------------------------    (15).Ailvator----------------------------------------------------------------   (16).V-tail-------------------------------------------------------------------   (17).Snap-roll-------------------------------------------------------------- (18).Delay------------------------------------------------------------------ (19).Throttle Needle Mixing--------------------------------------------- (20).Gyro Sens Setting---------------------------------------------------(21).Code matching--------------------------------------------------- ADVANCEDGLIDERSYS SETTING1.Model Selecting----------------------------------------------------------- 2.Model Name----------------------------------------------------------------   3.Model Setting--------------------------------------------------------------   4.Atl----------------------------------------------------------------------------   5.Ail-2--------------------------------------------------------------------------9910010110210310510610710810911011111211311411511511912012112212312466.Modulation Setting---------------------------------------------------- -
NORMAL SETTING1.Monitor---------------------------------------------------------------------2.Dual Rate  &  Exponential Setting—------------------------------------ 3.Abk. Curve Setting-------------------------------------------------------4.Servo Reverse------------------------------------------------------------   5.End Point------------------------------------------------------------------   6.Sub Trim-------------------------------------------------------------------    7.Auxiliary Channels Setting---------------------------------------------   8.Trim Step Setting---------------------------------------------------------9.Flaperon------------------------------------------------------------------- 10.Flap Trim------------------------------------------------------------------11.Ail-diff--------------------------------------------------------------------- 12.Elev-flap----------------------------------------------------------------- 13.Fail Safe------------------------------------------------------------------14.Timer---------------------------------------------------------------------15.Advanced-----------------------------------------------------------------7.RF Setting---------- --------------------------------- ---------------------8.Stick Setting--------------------------------------------------------------9.Adjustment--------------------------------------------------------------10.Reset Setting-----------------------------------------------------------11.Send Data---------------------------------------------------------------12.Receive Data-----------------------------------------------------------13.Sound--------------------------------------------------------------------14.Contrast Setting--------------------------------------------------------About---------------------------------------------------------------------- Language---------------------------------------------------------------------   INSTRUCTION(1).Curve setting--------------------------------------------------------- (2)-(8).PROG.NOR.MIX1-7---------------------------------------------   (9)-(12).PROG.CUR.MIX1-4--------------------------------------------   (13).butterfly----------------------------------------------------------------    (14).elevon-----------------------------------------------------------------    (15).ailvator----------------------------------------------------------------   (16).V-TAIL-----------------------------------------------------------------   (17).Start OFS------------------------------------------------------------- (18).Speed OFS-----------------------------------------------------------(19).Code matching-----------------------------------------------------ADVANCED1241251261271281291301311311311321331341351361371381391401411421431441451461481491501511521531541551561567
ContentsThank you for your attention and support to WFLY radio!WFLY promises every WFT09S radio control system include thefollowing contents:1.           4096  transmitter2. Battery holder for transmitter3. Neckstrap4. Trainer cable/Data transfer cable5. Simulator cable6. WFR09S  2.4GHz  9 channel receiver PCMS7.Li-po Voltage Regulation8. English instruction manual.INSTRUCTION8
 Contents1. Transmitter 2. Transmitter batteryholder3. Neckstrap4. Trainer cable/Datatransfer cable5. Simulator cable 6. WFR09S 2.4GHz    9ch receiverINSTRUCTION7.Li-po Voltage    Regulation8.CD manual9
AntennaAlarm lightRF lightVCSwitch  FTrainer switchSwitch  DSwitch  EVRBuzzerNeckstrap attachmentLCDOK/Down/RightUpLeftAileron trimPower switch Throttle trimAileron/throttle stickDecreaseMenuExitIncreaseRudder trimElevator trimRudder/elevatorstickVLSwitch  BSwitch  ASwitch  CVAVB Power lightCharge holeTRANSMITTERMODEL NO.: MODULATION: PPM, PCMS 1024, PCMS 4096OUTPUT POWER: ≤100mWPOWER SUPPLY: 9.6-12VCURRENT DRAIN: 250mABand: 2.4GHzTRANSMITTER FRONTINSTRUCTION10
TRANSMITTER BACKBattery coverDSCINSTRUCTION11
WFR09S 9 Channels Receiver (PCMS)1.AIL:Aileron (Channel 1)------------------------2.ELE:Elevator (Channel 2)----------------------3.THR:Throttle (Channel 3)-----------------------4.RUD:Rudder (Channel 4)-----------------------5.GYR:Landing Gear/Gyro (Channel 5)---------6.PIT:Pitch (Channel 6)------------------------------  -7.AUX1:Auxiliary channel 1 (Channel 7)---------8.AUX2:Auxiliary channel 2 (Channel 8---------9.Power:Input +4.8-6V-----------------------------(There are 9 rows needles, 3 needles in each row,from the top needle to the bottom, the 3 needles are PCMS/PPM pulse, +5V and Ground.)This receiver has Fail safe function.INSTRUCTIONRECEIVER   Resolution 4096(with PCMS 4096 modulation)2.4GHz 9 Channels receiverDual MCU, Dual antenna, Dual circuits,Resolution 4096 receiverMODEL NO.: WFR09STYPE: 9 CH PPM /PCMS 1024/PCMS 4096BAND: 2.400-2.483GHz POWER SUPPLY: 4.8-6VRECEIVER SENSITIVITY:-97dBmWEIGHT: 14.8  gDIMENSION: 44.8mm x27.9mm x16.39mm  Characteristic  Can effectively select the best signal   Enhance the reliability   Improve the response speed;  Enhance the anti-interference   Increased use of range 12
Trainer functionTwo  WFT09SII  transmitters can transfer data and realize trainer function.Setting Method:1).Data transfer function: use Trainer cable/Data transfer cable to     connect two WFT09SII  transmitter.     Select “Send data/receive data” in SYS setting to transfer the data.2).Trainer function:  use Trainer cable/Data transfer cable to connect     two WFT09SII  transmitters.     Insert RF module to the trainer transmitter, student transmitter      doesn’t insert the RF module.  Pull Trainer switch for student transmitter operating. If any wrong   operation occurs, trainer pushes trainer switch and student   transmitter stops sending signal, trainer transmitter controls the  aircraft.INSTRUCTION13
FLYING SAFETY WARNINGSDangers:If  you  use  it  without  proper  operation,  it  is  possible  to  hurt                                    you  seriously  or  may  even  cause  death.Warnings:If  you  use  it  without  proper  operation,  it  may  make  you  or                                        others  to  hurt  badly  or  may  even  cause  death,  and  it  may                                        cause  slight  hurt  or  damage  to  things.Notices:If  you  use  it  without  proper  operation,  it  may  cause  you  to                                hurt  slightly  or  damage  things  ,  but  it  won't  hurt  you  seriously                normally. Special  Symbol  Instruction Forbiddance!    Obligation! Warning!Flying  Notice(warning)Do  not  fly  at  night  ,  in  rain  day  ,or  in  strong  wind, which  will damage  the  device  or  plane.  This  deviceis  not  water-proof.       Please  check  every  servo  works  properly  and  eliminateany  disturbing  signals  before  you  play  it.Notices:    Turn  on  the  transmitter  first,  then  the  receiver.  When  turning                                  off  the  system,  turn  off  the  receiver  first,  then  the  transmitter.Notices:Children  under  14  must  be  accompanied  and  instructed  by                 adults!To use the product safely, please pay attention to the instructionas follows.Please pay special attention to the symbol as follows:INSTRUCTIONchanges or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Notices:14
FEATURESComputerized transmitterHigh Speed, High Resolution, optimized 2.4GHz PCMS 4096 Convenient stick adjustment, make you free usageTree-like Multilayer Menu, human oriented designExcellent white LED backlight, less visual tiredness132 X 64 FSTN LCD, easy operating buttons85 model memory10 point curve(in any X and  Y  direction edition)Easy complex curve adjustmentDifferent Sub trim adjustment sound, easy identify the centerData transfer function, easy teaching and learningMulti-function, intuitive data setting, easy checkingTightness and length of the control stick can be adjusted freely Excellent touch of the stick movement3  independence timer, all can be set to count down or incrementINSTRUCTION15
MENUMenu button brings you to the function list of the transmitter.EXITExit button is to back the previous menu or exit edit.+This button is to increase the value. If you press it for a while,the increasing speed will be faster.-This button is to decrease the value. If you press it for a while,the decreasing speed will be faster.Cursor buttonsMove the cursor.OKThe button in the middle of the direction buttons is the OK button.The function is as follows:To enter the function list.To enter the edit function.To back the default for long time press.ButtonsINSTRUCTION16
 INSTRUCTION 2.4G system can automatically recognize WFLY PCMs and PPM.WFLY 2.4GHz Operation instructions2.  Fail Safe SettingA.Power on receiver.B.Press Set of the module then start transmitter and hold SET for  2  seconds. The green LED flashes, indicating the transmitter enters the code matching status.C. The Green LED of receiver flashes, the output data of transmitter is the data of Fail Safe Setting of the receiver.D. Due to the heavy interference or out of normal range, the receiver enters FailSafe. The Red LED of the receiver lights when it is in Fail Safe status.Code matchingDescriptionThis function is useful under the situation when the transmitter need to be match and bind  with receiver. settingEnter "normal settings" and choose "advanced", use up and down key to choose coding, press  ok to select. The screen will display "OK: Cancel". Set your receiver to coding mode, and  use up or down button to choose Ok and then press OK button. The screen will display "Coding  wait.." Code matching will be succeeding after the receiver back to normal mode.1.17
Allen keyTop threadSteps:1   2   Put the stick head on the stick.Put the top thread in the stick head with allen key.3.Addjust top thread in the stick head with allen key to fix the height  of the stick head.Adjust the stick head:Stick headINSTRUCTIONAdjust the height higher: frist make the top thread loose with the allen key, then twist the stick head up, then, make the top thread tighten with allen key, Ok, the stick head was turned up.Adjust the height lower: frist make the top thread loose with the allen key, then twist the stick head down, then, make the top thread tighten with allen key, Ok, the stick head was turned down.Twist  the top thread down from here, the height of the stick head depends on the depth of the top thread.Put the stick head cover the control rod on the left and right sides,don't twist down the  stick head to the bottom, and then put top thread with allen key to adjust the height you need.Stick 18
              Bolt1 Bolt2 Bolt3 Bolt4  change the throttle direction of mode1 or  2:Tak e the metal chip andthe screw down, and put it on the similar position of the right side  .Set up release link and springer, according your habitto addjust the the tightness of screw 2 to adjust the control feeling.Tak e repositor and spring down, and put it on the left side of the location of corresponding.then twist bolt  1 down until withstand the adjust nail in case adjust nail will move away.Put on the metal chip, accordingyour habit to adjust the elasticityof screw 3 and screw 4 to adjust the damp of throttle control feeling. INSTRUCTION19
HELICOPTERPress Menu and turn on the transmitter to enter SYS SETTING.Select MODEL SETTING, press OK button to select the modeltype.Restart the transmitter after setting.INSTRUCTIONHELICOPTER20
1. Opening ScreenThe opening screen displays the voltage, timer, model, aileron, throttle, elevator and rudder state.2. Menu ScreenThere are “Normal setting”, “SYS setting”, “Advanced”.Turn on the power switch, the LCD displays as follows.A. Normal settingTurn on the transmitter,  press the menu button, the LCD displaysas follows. 1. MONITOR2. DUAL RATE & EXPONENTIAL SETTING3. SERVO REVERSE4. END POINT5. SUB TRIM6. SWASH PARAM SETTING7. AUXILIARY CHANNELS8. THROTTLE CURVE SETTING9. PITCH CURVE SETTING10. REVOLUTION MIXING11. TRIM STEP SETTING12. THROTTLE CUT SETTING13. FLY MODEL SWITCH14. THROTTLE HOLDING SETTING15.  FAIL  SAFE16. TIMER17. ADVANCED18. LANGUAGEVoltage Start timeTimer  ATimer  B Timer  CModel typeThrottle trim displayRudder trim display Aileron trim displayElevator trim displayEditing mode and function introductionNote: Press EXIT you can see the model name.Setting method:1. Use direction button to select theediting part, use up/down buttons toselect function item. Left/right direction button to turn page.2. Press OK button to enter submenu.The submenu function is in the nextchapter.3. Press EXIT button to back previousmenu and the data is set automatically.INSTRUCTIONModel nameHELICOPTER21
B. SYS SETTINGPress Menu and turn on the power switch, the LCD displays as follows.1. MODEL SELECTING2. MODEL NAME3. MODEL SETTING4. ATL5. MODULATION SETTING6. SWASH SELECT7. STICK SETTING8. ADJUSTMENT9.REST SETTING10.SEND DATA11. RECEIVE DATA12. SOUND13.CONTRAST SETTING14. ENGINEER MODEL15. ABOUT16. LANGUAGESetting method:1. Use direction button to select the editing part,use up/down buttons toselect function item. Left/right directionbutton to turn page.2. Press OK button to enter submenu. The submenu function is in the nextchapter.3. Press EXIT button to back previousmenu and the data is set automatically.C. ADVANCED1. Enter “NORMAL SETTING”, use right direction button to turn page,select “ADVANCED”.Press OK button to enter.Setting method:1. Use direction button to select the editing part,use up/down buttons to select function item.Left/right direction button to turn page.2. Press OK button to enter submenu. The submenufunction is in the next chapter.3. Press EXIT button to back previous menu and thedata is set automatically.INSTRUCTIONHELICOPTER22
1.Model selecttingThere are 85 helicopter models. You can select any one to set.Setting Method:Press Menu and turn on the transmitter to enter “SYS SETTING”Use up/down button to select  “Model selecting”, OK button is to enter editing.Steps:1. Use up/down direction button to select the model.2. Press OK button to select.3. Press EXIT after setting.SYS SETTINGINSTRUCTIONHELICOPTER23
2. Model nameThis function is to make new names by users.Setting Method:Press Menu and turn on the transmitter to enter “SYS SETTING”Use up/down button to select  “Model name”, OK button is toenter editing.Steps:1. You can edit the underlined letter.2. Press OK button to choose the word you like.3. Press EXIT after setting. INSTRUCTIONHELICOPTER24
3. Model settingYou can select the model type. There are three type: HELI, ACRO, GLID.Setting Method:Press Menu and turn on the transmitter to enter “SYS SETTING”Use up/down button to select  “Model setting”, OK button is to enter editing.Steps:1. Use up/down direction button to select the model type.2. Press OK button to confirm.3. Press EXIT after setting. INSTRUCTIONHELICOPTER25
Adjustable travel limit (ATL) makes throttle trim effective only atlow throttle, disabling the trim at high throttle. This prevents pushrod jamming due to idling trim changes. This function defaults to ON. If you are not using channel 3 for throttle, you may want trimoperation the same as on all other channels. To do so, set ATL toOFF.Setting Method:Press Menu and turn on the transmitter to enter “SYS SETTING”Use up/down button to select  “ATL”, OK button is to enter editing.Steps:1. Use direction buttons to select the editing part.2. Press +/- button to set ATL function.3. Press EXIT after setting.4. ATLINSTRUCTIONHELICOPTER26
Because of the different receiver modulation PPM/PCMS1024/2.4G PCMS4096, the transmitter should be accordance with the receiver modulation.Setting Method:Press Menu and turn on the transmitter to enter “SYS SETTING”Use up/down button to select  “Modulation setting”, OK buttonis to enter editing.Steps:1. Use direction buttons to select the editing part.2. Press OK button to confirm. Restart the transmitter and it    works.5.Modulation setting6.RF settingINSTRUCTIONHELICOPTERDescriptionThe user can turn off the RF module during emulation to minimize power consumption.Setting methodPress menu button during power on to enter system setting menu, use up/down button to select "RF setting". press OK button to enter setting interface.as shown on the picture, choose ON or OFF and press OK. Reboot the transmitter to active.27
7.Swash selectSetting Method:Press Menu and turn on the transmitter to enter “SYS SETTING”Use up/down button to select  “Swash select”, OK button is to enter editing.Steps:1. Use direction button to select the editing part.2. Press +/- button to choose the swash type.3. Press EXIT after setting.There are  6  kinds of swash. You can select the swash you preferred. If you use 120 degree CCPM helicopter, the servoswill realize mix function automatically. Please select the swashaccording to your helicopter swash type.1  servo (not CCPM, normal helicopter)2  servos (180 degree)3  servos (90, 120, 140 degree)4  servos (90 degree)INSTRUCTIONHELICOPTER28
8.Stick settingThere are 4 kinds of model, you can use up/down direction button to select the model you preferred.Setting Method:Press Menu and turn on the transmitter to enter “SYS SETTING”Use up/down button to select  “Stick setting”, OK button is to enter editing.Steps:1. Use direction button to select the editing part.2. Press up/down button to choose Stick mode.3. Press EXIT after setting.1-aileron2-elevator3-throttle4-rudderINSTRUCTIONHELICOPTER29
This function is to set the central, high and low point of four stickswhen users changed the mode I or II by themselves.Setting Method:Press Menu and turn on the transmitter to enter “SYS SETTING”Use up/down button to select  “ADJUSTMENT”, OK button is to enter editing.Steps:1. Use direction button to select the editing  part. Ta ke the aileron adjustment for example.2. Make the stick in the mid-point location.  Press OK button to select any stick you want to adjust.3. Select into the Figure 2, when the "center" highlights, press the "ok"button directly (the mid-point has been adjusted), then enter the highadjust.4.The "high” highlights, take the stick gently in the right side  (throttle /elevator in the top, aileron / rudder in the right),press "ok" button  ( the max adjust is OK), enter the low adjustment.5.The "low" highlights, take the stick gently in the left side (throttle /elevator in the bottom, aileron / rudder in the left),press "ok" button (the min adjust is OK).6. Press OK or RESET to confirm the record or reset.7. If the record is wrong, press OK will back to step 3.9.AdjustmentINSTRUCTIONHELICOPTER30
This function is to back default.Setting Method:Press Menu and turn on the transmitter to enter “SYS SETTING”Use up/down button to select  “Reset setting”, OK button is to enter editing.Steps:1. Use direction button to select the editing part.2. Press +/- button to back default.3. Press EXIT after setting.10.Reset settingINSTRUCTIONHELICOPTER31
11. Send dataTwo  transmitters (WFT09S) can copy data by a trainer cable/datatransfer cable. This function together with the next function“Receive data” can realize the data copy. Setting Method:Press Menu and turn on the transmitter to enter “SYS SETTING”Use up/down button to select  “Send data”, OK button is to enter editing.Steps:1. Select the model data you want to send out.2. Press OK to send.INSTRUCTIONHELICOPTER32
12.Receive dataTwo  transmitters (WFT09S) can copy data by a trainer cable/datatransfer cable. This function together with the previous function“Send data” can realize the data copy. Setting Method:Press Menu and turn on the transmitter to enter “SYS SETTING”Use up/down button to select  “Receive data”, OK button is to enter editing.Steps:1. Press OK to receive data.2. Restart the transmitter after receiving the data and it works.INSTRUCTIONHELICOPTER33
This function is to select the sound ON and OFF.Setting Method:Press Menu and turn on the transmitter to enter “SYS SETTING”Use up/down button to select “SOUND”, OK button is to enter editing.Steps:1. Use +/- button to select ON and OFF.2. Press OK button to confirm. 3. Press EXIT after setting.13.SoundINSTRUCTIONHELICOPTER34
This function is to adjust the LCD brightness by increasing or decreasing the contrast value.Setting Method:Press Menu and turn on the transmitter to enter “SYS SETTING”Use up/down button to select  “Contrast setting”, OK button is to enter editing.Steps:1. Use +/- button to increase or decrease the value.2. Press OK button for a while is to back default. 3. Press EXIT after setting.14.Contrast settingINSTRUCTIONHELICOPTERThis item shows the Version of WFLY radio.15.About35

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