Boss BC-2 Combo Drive, effect pedal, overdrive, level, bass, treble, SOUND-control from "Clean" over "Crunch" to "Drive", precise reaction to all nuances of playing technique and volume variation, perfect, complex modeling of the AC-30 with authentic cabinet resonances, dimensions: width 73 mm x depth 129 mm x height 59 mm, weight: 0.44 kg, optional power supply DC or 9 V alkaline battery