Function:
1 Amplifier card with BT 4.0 receiver, AMP board is high performance according to strict rules.
2. Installation is very easy, no special operation is required, and the installation is easy to complete.
3 This dual channel audio power amplifier board supports simple and practical USB charging function.
4 Support 18650 battery power supply, maintain a long service life and can be used for a long time.
5 Without obstacles, the furthest transmission distance is 20 meters, it can be used for DIY development, learning, and testing.
How to use:
1 Please install the lithium battery 18650 battery first, and be careful to distinguish the positive and negative poles. (Please buy the battery by yourself)
2. Speaker has two wires connected, red is positive, black is negative.
3 Insert memory card with song file into memory card slot or U disk with song file into the USB interface.
(BT link is also available, but you need to turn on the device before connecting to BT)
4 When you turn on the power button, the memory card or U disk will automatically read and start playing the song. If&
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