The SUPER is a high performance, analog compressor pedal with true bypass and COMP,ATTACK,SENSE,GAIN,LEVEL controls The Comp makes a good sounding instrument sound even better. The Super Compressor is analog optical compressor pedal designed for guitar, offering a smooth, vintage-style compression to enhance your tone. It uses an optical circuit, which provides a softer attack and sense compared to other compressor types. This makes it ideal for taming dynamics without drastically altering your natural sound, making it suitable for players who want to control their dynamics while preserving their original tone. Optical compressor pedal Input Impedance 1.8 Mohms True Bypass Type: Analog Compressor Power Requirements: DC9V, 60mA max -center negative (not included) Dimensions 11.5 x 6.5 x 5.5CM Weight :290g Color: As Shown Material: Metal Package Contents: 1 * Optical Compressor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.