ITEM NAME:TDA7293 Digital Audio Amplifier Board Single Channel AC 12-32V 100W Description: Low distortion, low noise, high pressurization Switch machine mute,over heat protection, short circuit protection Output power:100W Power input:Double AC 12-32V,100W Channel type:1.0 mono Frequency range:20Hz-20KHz Compatible speaker:4-8&;,50-200W,3-10'' bookshelf speaker and floor type sound box Specification: Material:PVC Size:60*50*23mm Package Includes: 1x Audio Amplifier Board.1x Audio Amplifier Board. Power input:Double AC 12-32V,100W. Switch machine mute,over heat protection, short circuit protection. Channel type:1.0 mono. Compatible speaker:4-8&;,50-200W,3-10" bookshelf speaker and floor type sound box.