XH-A157 dual-channel digital amplifier board with DC5V input voltage.Adopt 3.5mmaux audio input, 50K volume adjustment on board.Input, onboard 50K volume adjustment relay, which can be used as amplifier , and also can freely adjust the volume.This amplifier also has dual channel audio output with 2*3W .It has the characteristics of small size, high efficiency, high and low heat generation.Product name: Dual-channel digital amplifier boardProduct : XH-A157Input voltage: DC5VAudio input: 3.5mm AUX audio cableNumber of channels: dual-channelOutput : 2 * 3WColour:greenMaterial:PCBSize:41 x 37 x 13mmPackage Contents:1 x Amplifier BoardOnly the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.