Compact size acoustic preamp pedal, durable aluminum housing, powerful 3-band EQ with pre/post selection to boost and shape your bass tones, DRIVE channel with a wide tonal range from mild to massive distortion, thoughtfully integrated optical compressor designed, BLEND knob to combine the driven signal and the direct signal, DI output to feed the signal directly to the mixer or for recording, effects loop for extended bass effects, different outputs (XLR output, ¼" output, parallel output of ¼”) to work with bass amps, audio interfaces, mixers and other equipment, phone jack for quiet practice, Ground-Lift function to eliminate ground noise, works with a 9V power adapter or battery 9V, dimensions: 140 x 120 × 54mm, weight: 470g.