The Xotic SP Compressor delivers a wide range of amazing tones using operational transconductance amplifier technology. This SP compressor is designed to change a differential input to produce a quality output. Musicians can utilize this pedal to produce cool sounds such as vintage, metal, or jazz. There are helpful compressor settings to select low, medium, and high. The Xotic SP compressor features bypass switching, blend control, and a dry-blend knob. Use an AC adapter or a nine-volt battery.