*USB charging
*Maximal Sound Output: 118dB ± 4dB
*Frequency Range: 400Hz-3800Hz
*Equivalent Input Noise Level: ≤ 30dB
*Input Voltage: AC110-220V
*Output Voltage : DC5V
*Rated Power Supply Current Consumption: ≤ 2mA
*Do not remove or replace the built-in lithium battery
*The power adapter and the main unit have a certain amount of heat during the charging process, which is normal.
* Charge for at least 4 hours at the first time, and then use out completely . After three consecutive times, the battery can be used optimally.
Package includes : 1 piece blue/silver
After booting, press and hold the M button for about 3 seconds to hear a very clear sound,
Turn on the Bluetooth function of the mobile phone, enter the Bluetooth search interface of
Note: When the battery is low, the Bluetooth function will not be used, but the sound amplifier
Bluetooth usage:
1. When a call comes in, press the M button to answer or hang up, and press and hold for
2. If there is no sound signal for 10 seconds, the machine will automatically exit Bluetooth
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