ITEM NAME:100W High Power TDA7293 Digital Audio Amplifier AMP Board Mono Single Channel ES.1pc xTDA7293 Digital Audio Amplifier. Must with IC radiator. Channel type:1.0 mono. Switch machine mute,over heat protection, short circuit protection. Power input: Double AC 12-32V,100W. Compatible speaker:4-8ÃŽ ©,50-200W,3-10" bookshelf speaker and floor type sound box.