Selling to organize my equipment. Used only at home, and there are no noticeable scratches. This is an effects pedal that is like the preamp section of a Sadowsky active bass, made into a pedal. Boosting the Bass and Treble will relatively lower the Mid, making it easy to create a scooped sound. Bass knob: Boosts the 40Hz range (+18dB) Treble knob: Boosts the 4kHz range (+18dB) Volume knob: Adjusts the volume The footswitch is a bit stiff. When attaching a switch hat that is not transparent, the ON/OFF LED will be difficult to see. For your reference. The box and accessories such as the instruction manual are all included. #Bass #EffectsPedal #Sadowsky #Preamp