ITEM NAME:PAM8406 5Wx2 Stereo 2 Way Digital Amplifier Board w/Volume Potentiometer Product Description Description: Feature: 1. Excellent noise suppression. in the absence of contact input audio, you will not hear any noise even put your ear close to the speaker 2. The two-channel stereo, 5V power supply can output 5W+5W power, directly drive 4, 8 speakers, output power, full of energy, good sound quality, with left and right channel volume adjustment. 3. Unique non-LC filter Class-D digital power board, it can be used directly for the USB-.Included: 1 X PAM8406 Digital Amplifier Board. Unique non-LC filter Class-D digital power board, it can be used directly for the USB-powered from computers. Ultra-miniature design, it can easily be placed in a small space inside a variety of digital products, high amplification efficiency.