This is a 5V 5W + 5W Stereo Audio Amplifier Module, a small audio amplifier circuit board with dual independent channels, built-in 2.0 channel audio power amplifier module, and power amplifier module. It has a small size, light weight, low power consumption, strong function, high fidelity, strong compatibility, and good sound quality. This audio amplifier board is a DIY audio enthusiast's best choice, suitable for small and medium-sized speaker systems, car audio, KTV, large and medium-sized bars, etc.