Product description
1.It must connect a 7.4V lithium battery to open.---this is very important for power on.
2.The positive and negative poles of the battery must be connected correctly,otherwise the board will be burnt.
(1).Can use U-disk and TF card Play Music
(4).With Microphone Input
(5).Support 7.4V lithium battery,DC 9V charger can charging for the battery
(6).Rated power 25W+25W(4ohm)
1* 7.4V Bluetooth Amplifier board