User Manual
Page 16
... metal materials, keys, or jewelries. z Do not disassemble the battery or solder the battery poles. To reduce the risk of damage to hearing, lower the headset volume to the device, result in the non-operation of the device, and cause danger. Accessories Use the accessories delivered only by the manufacturer. Battery... charger from the device, may cause a fire or a malfunction of the charger. z Use the AC power supply defined in use. Prevention of Hearing Damage Using a headset at high volume can damage your body.
... metal materials, keys, or jewelries. z Do not disassemble the battery or solder the battery poles. To reduce the risk of damage to hearing, lower the headset volume to the device, result in the non-operation of the device, and cause danger. Accessories Use the accessories delivered only by the manufacturer. Battery... charger from the device, may cause a fire or a malfunction of the charger. z Use the AC power supply defined in use. Prevention of Hearing Damage Using a headset at high volume can damage your body.