User's Manual

CAUTION：

1. Use careful with the earphone maybe excessive sound pressure from

earphones and headphones can cause hearing loss.

2.This device battery is not removable, please do not disassemble the

device.

3. The product shall only be connected to a USB interface of version

USB3.1 Type-C.

4. Adapter shall be installed near the equipment and shall be easily

accessible.

5. Operating temperature：-20~40℃

Charging temperature

：

Charging 0~40

℃；

Discharging -20~40

℃

6. Charger1: A88-3771-5V2A

Charger2: A70-502000

Charger3: A824-5V2A

7. The device complies with RF specifications when the device used at

5mm from your body.

8. To prevent possible hearing damage, do not listen at high volume

levels for long periods.

9. Earphone and USB cable are shielded.