Lenovo WD770-B LENOVO WIRELESS HEADSET W770 (DONGLE) User Manual

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Document ID	1609692
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Document Description	Users Manual
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Permanent Confidential	No
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Document Type	User Manual
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Filesize	93.54kB (1169198 bits)
Date Submitted	2011-12-27 00:00:00
Date Available	2011-12-27 00:00:00
Creation Date	2011-12-06 14:24:18
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Document Lastmod	2011-12-23 22:49:38
Document Title	Users Manual
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W770
Wireless Headset
W770
Wireless
Headset
User Manual
Product name: Lenovo Wireless Headset W770
Product standard: Q/HDLCS103-2009
Manufacturer: Lenovo (Beijing) Limited
Address: No.6 Chuang Ye Road, Shangdi Information
Industry Base, Haidian District, Beijing, China
Zip Code: 100085
Lenovo website: www.lenovo.com
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W770 Wireless Headset User Manual
I. PRODUCT INTRODUCTION
Dear customers,
Thank you for selecting high-quality electronic product offered by Lenovo. This headset
is manufactured with internationally advanced 2.4 GHz wireless audio transmission
technology. This technology is characterized by stable signal (easily avoiding the
interference of other signals with high frequency hopping anti-interference technology),
long transmission distance and Hi-fi stereo.
This headset consists of one USB Dongle and one receiver (headset). Its in-built
Lithium polymer battery of 380 mAh provides a standby time of 6 hours, allowing you
enjoy the music and chat online freely.
OS requirement: WIN XP, WIN 2000, WIN 7, VISTA, Apple MAC
Compatible players: MediaPlayer, RealPlayer, etc.
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W770 Wireless Headset User Manual
II. Introduction of headset connection
1. First, connect the USB Dongle to the USB interface of the computer. The computer will
automatically recognize the USB Dongle. After it prompts that the device installation is
completed, the device can be used normally (with the computer providing tips for first
use).
2. Turn on the headset. After it completes connection with the USB Dongle, the headset
can be used normally.
III. Headset buttons
Working State
Indicator
On/Off
Charging
Indicator
Toggle Switch
Charging Port
1. On/Off
a. Power On: By pressing this button for over 1 second in power off state, blue LED
lamp is constantly on, and the headset is started.
b. Power Off: By pressing this button for over 1 second and then releasing it in power
on or playing state, blue LED lamp is off, and the headset is powered off.
2. Toggle switch
a. Pause/Play: In playing state, press middle part of this button to pause, and press
middle part of this button again to resume the playing.
b. Previous/Next: Press this button and hold for a moment to play the previous/next
song.
c. Volume +/-: Toggle this button upwards/downwards to increase/decrease the
volume.
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W770 Wireless Headset User Manual
IV. Indicator Lamp
1. Red LED lamp
Red LED lamp is the charging indicator. It lights on when the device is charged, and is
off when the charging completes (or low level lighting).
2.	Blue LED lamp
Blue LED lamp is the working state indicator.
a. When power on, this lamp is on indicating the device works normally;
b. This lamp is off when the device is powered off or the battery is out of power.
V. Microphone
The microphone is hidden multi-directional microphone, providing superior gaming and
chatting experience.
Microphone
VI. Charging Instructions
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Charging cable
Charging port
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W770 Wireless Headset User Manual
1. Connect 3.5 mm charging plug with the headset first, and connect USB connector of
the charging cable with USB port of the computer or USB port of dedicated charger.
Red LED lamp is on and the device enters the charging state.
2. When the charging is completed, red LED lamp is off. You could just disconnect the
charging cable.
Notes:
● This headset is equipped with inbuilt irremovable charging battery. Please do not
remove the battery to avoid the damage to the headset.
● The charging time of the headset battery for the first time should be 12 - 24 hours
to activate the best operating state of the battery. Later on, the charging time will
be 2 - 3 hours (please do not charge the device for over 24 hours to avoid the
damage to the service life of the battery).
● This 3.5 mm plug can only be used for connecting the charging port of over
W770, but cannot connect the audio port of the audio device such as PC.
VII. Wearing Instructions
1. Please distinguish the left and right side of the headset when wearing it: “L” on the
bracket indicates the left side, while “R” indicates the right side.
2. Both sides of the headset are equipped with collapsible headphones. The length can be
adjusted accordingly to make you enjoy the music comfortably! The stretched length is
24±1 mm.
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W770 Wireless Headset User Manual
VIII. Rotating ear pad
90 degrees of
rotation
IX. FAQs
1. No sound can be heard
a. Check whether the USB Dongle has been plugged in USB port of the computer, and
the microphone has been powered on;
b. Adjust the volume with the toggle switch on the headset;
c. Close and reopen the multimedia player;
d. Check the headset power and charge it if low;
e. If the problem persists, please re-match it by following the matching instruction.
(Matching instruction: Press and hold “On/Off” button for over 15 seconds when the
headset is powered on, and blue LED lamp flashes quickly and beeps. At this point,
the headset enters the searching state and the matching begins. Blue LED lamps
will be on constantly when the matching is completed. The best matching distance
is 20 cm - 50 cm.)
2. Short receiving range
Check whether there are other devices at the same frequency beside USB Dongle, and
move USB Dongle to an open place.
3. During the use, you may hear sizzling sound in the headset or experience an
interruption due to the interference from your surrounding wireless devices or
screening of obstacles.
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Note: If the headset can not be powered on, the reason may be low power after
long time with no use. In this case, please charge it first.
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W770 Wireless Headset User Manual
X. Product Parameter
Headset:
Drive unit................................................................................................................ 2 x 40 mm
Frequency response.........................................................................................20Hz ~ 20KHz
Impedance................................................................................................. 32Ω±15% @ 1kHz
Sensitivity (SPL)................................................................................103±3dB/1mW @ 1KHz
Signal to noise ratio.........................................................................................................65dB
Working voltage................................................................................................................3.7V
Working current..............................................................................................................55mA
Battery capacity..........................................................................................................380mAh
Continuous working time.................................................................................................... 6H
Charging time.................................................................................................................. 2.5H
Input power....................................................................................................................20mW
Maximum input power...................................................................................................45mW
Net weight of headset...................................................................................................... 160g
Net weight of USB Dongle................................................................................................... 6g
Microphone:
Frequency response....................................................................................... 100Hz ~ 10kHz
Impedance...............................................................................................2.2kΩ±10% @ 1kHz
Sensitivity................................................................................. -38±2dB @ 1kHz 0dB=1V/PA
Signal to noise ratio.........................................................................................................55dB
USB Dongle specification:
Working voltage...................................................................................................................5V
Working current..............................................................................................................55mA
Transmitting power.......................................................................................................+4dBM
Transmitting range............................................................................................................ 10M
Modulation mode........................................................................................................... GFSK
Frequency range.................................................................................. 2404MHz ~ 2476MHz
Interface...........................................................................................................................USB
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W770 Wireless Headset User Manual
XI. Package contents
W770
Wireless
Headset
❏ Wireless headset
❏ USB Dongle
❏ User Manual
User Manual
❏ USB charging cable
❏ Warranty and notice manual
Headset model: W770
CMIIT ID: 2011DP5808
USB Dongle model: WD770-B CMIIT ID: 2011DP5809
XII. Hearing protection
Suggestion for preventing the hearing damage:
1. When using the headset, too high volume may cause the hearing loss.
2. Please adjust the volume as appropriate: adjust the volume to the lowest level, open
the player, increase the volume gradually until you feel comfortable in hearing and
definition is not distorted.
3. If the dialog and other similar ambient noise can be heard without interference, the
volume is appropriate.
4. Adjust the volume to comfortable level and keep it. In case of the tinnitus, discomfort
or sound distortion, please decrease the volume or stop the listening, and check your
acoustic state.
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W770 Wireless Headset User Manual
XIII. Safety instruction
Please read all warnings and instructions carefully.
1. Do not use this headset near the water source to prevent water from entering the
headset or damaging the headset function.
2. Install/use this headset according to the instructions of the manufacturer.
3. Keep this headset away from fire (such as flaming candle).
4. Do not install this headset near the heat source (including the heater, heat ventilating
devices or other heat-producing devices).
5. This headset can only be used with the accessories specified by the manufacturer.
6. This headset must be repaired by the qualified personnel.
Warning: Wireless USB Dongle will produce electromagnetic signal, so use it
carefully in places where the heart pacemaker or related medical device is used.
XIV. FCC Note
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following
measures:
– Reorient or relocate the receiving antenna.
– Increase the separation between the equipment and receiver.
– Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
– Consult the dealer or an experienced radio/TV technician for help.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions: (1) this device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.
The manufacturer is not responsible for any radio or TV interference caused by
unauthorized modifications to this equipment. Such modifications could void the user's
authority to operate the equipment.
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