This is a drive pedal that uses the preamp section of a Soldano SLO-100. It has been modified with new, high-gain vacuum tubes and is fully functional. This is a full-fledged preamp pedal using two 12AX7 tubes. It's a 100V model that delivers a superb drive sound and distortion, driven by the same voltage as an amplifier. The serial number has been digitally blurred in the photos. No other accessories are included besides what is shown in the photos. Soldano, Diezel, Friedman