3pcs PAM8403 Digital Amplifier Board 4 Channels Mini Amplifiers USB 5V Power Supply Amplificador DIY 4x3W for Dual Audio

Features:Product Name: Two-channel digital amplifierInput voltage: DC 5VAudio input: support for dual audio inputNumber of channels: 4 channelsOutput power: 3W*4Size: 46*29*13mmInstructions:Switch ONWhen two audio switches switch to ON,At this time, the power amplifier board supports single audio input.Simultaneous output of four channelsSwitch to play 12When two audio switches switch to 12,At this time, the power amplifier board supports dual audio input.The output form is a Corresponding output.As shown in the wiring diagram: ①audio input corresponds to audio output①left channel and ①right channel②audio input corresponds to audio output②left channel and ②right channelNote:When switching from dual audio to single audio, You need to unplug a set of audio before switching the switch.otherwise it may appear, music is confusing, harsh, and may cause electric current to reverse, damage your audio equipment, This amplifier does not support audio switch One up/one down modePackage Included:3 x PAM8403 Digital Amplifier Board 4 Channels Mini Amplifiers