1.Multi-function guitar amplifier 2.Control :Tone(High,Mid,Bass) 3.Jack : Input, Output 4.Speaker :1*5"*8 oh Serial number Model Name The disposition showed 1DG-03Battery 3w sound box Models the shell. Input, distortion, tonality. , volume, earphone .9v power source box, 3 inch speaker box body size: 123*60*262DG-15Battery 15w sound box Wooden casing: Signal input, volume, MP3 input, volume bass, ...