This an Epicenter Audio Valveboy tube overdrive pedal in excellent condition. It uses (2) 12AX7 preamp tubes and is really more of a true preamp, than a pedal. It comes with a 12V AC power supply. This one has a very low serial number of 010 and it sounds great. This pedal is from our music store that we closed, it was display model, so it is still new!