... distortion, tonality. , volume, earphone .9v power source box, 3 inch speaker box body size: 123*60*262DG-15Battery 15w sound box ... treble compensation, MP3 input, volume, reverberation, bass, tenor, treble, 8” speaker 4FG-1010-15 W guitar sound box Wooden casing, input ... , the tenor, the treble, the reverberation, the earphone outputs, 10” speaker box body size: 335*180*3658FG-60R30~50W guitar sound ...