XH-A154 is a 2-channel digital amplifier board, input voltage is DC5V. Using 3Pin audio terminal input, the on-board 50K volume adjustment relay can be used to turn the power of the amplifier, and the volume can also be freely adjusted. The amplifier also has 2 channels of audio output, power 2 * 3W, is the of low-power office speakers amplifier. It has the characteristics of small size, high efficiency and less heat generation. High materials, safe and durable. Product name: Dual-channel digital amplifier board Product Model:XH-A154 Input voltage: DC5V Audio input: 3P terminal Number of channels: dual-channel Output power: 2*3W Colour:green Material:PCB Size: 41 x 38 x 13mm Package Contents: 1 x Amplifier Board 3 x Audio Cable Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.