![](http://ae01.alicdn.com/kf/H087259b2c7c24c8fa9c46bb5ab84b0d6R.jpg)
![](http://ae01.alicdn.com/kf/H366eb43434334878bdab8195aa3b0d33A.jpg)
Tips: the working voltage is 3.7-5.0V. The current is about 700 mA when one 4 ohm 3W speaker is connected, and the current is about 1400 mA when two 4 ohm 3W speakers are connected. If the current is not enough, automatic change of music or remote control will not work. (if you have this problem, please improve your power supply); too high voltage will burn the power amplifier IC and the main chip (be sure to pay attention not to connect reverse power and do not exceed the limit voltage, and do not use AC power)