120w Multi-function Amplifier Control:Volume(Guitar),Volume(Bass),Volume(CD/Key),Volume(Mic)Voleme(Echo),Volume(Clean) 120w Multi-function Amplifier Control:Volume(Guitar),Volume(Bass),Volume(CD/Key),Volume(Mic) Voleme(Echo),Volume(Clean), High,M-High,M-low,Low,Jack: Input, OutputSpeaker :2*10"*4 or 8 ohm