ITEM NAME:Mono Audio Amplifier Module Power Amplifier Board DIY Module Description: Super small size light weight, handy and easy to install. Top notch potentiometer, easy and smooth to adjust the volume and control the power switch. Crisp and clear sound output, low noise, give you best hearing enjoyment. Please note that do not connect to power if you do have the speaker connected, or will wreck the module. Safe Protection: amp board is designed with input reverse connection protection, short circuit protection, over heat protection, overcurrent protection, overvoltage protection, undervoltage protection Specification: Size: 75 x 60mm/2.95 x 2.36inch Material: PC (polycarbonate) Package Includes: 1 Piece TPA3116D2 100W mono power amplifier board.1 Piece TPA3116D2 100W mono power amplifier board. People always bought together with.