XIWXI TECHNOLOGY S21 TWS Bluetooth headset User Manual
SHENZHEN XIWXI TECHNOLOGY CO., LTD TWS Bluetooth headset
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S21 User Manual
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<noframes>TWS Bluetooth headset User Manual <br />Directly view this document at <a href="https://usermanual.wiki/XIWXI-TECHNOLOGY/S21-5470591.pdf">https://usermanual.wiki/XIWXI-TECHNOLOGY/S21-5470591.pdf</a> </noframes>
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