... Serial number Model Name The disposition showed 1DG-03Battery 3w sound box Models the shell. Input, distortion, tonality. , volume, earphone .9v ... “inch speaker. , 250*150*2803DG-25REffect storage battery 25w sound box The wooden casing, the USB connection, USB, the switch, ... bass, tenor, treble, 8” speaker 4FG-1010-15 W guitar sound box Wooden casing, input, degree of distortion, cut, bass, treble, ...