Feature: 1. Various Types: This bass guitar pedal delivers various types of compression via ATTACK, COMP, SENSE, VOL, GAIN knobs, which ensures clarity and makes sound stand out during live performance. 2. ATTACK and SENSE: The ATTACK and SENSE functions of this bass compression give it a strong compression, transparent tonality and a clear articulate sound production. 3. Extra Volume: This compression guitar pedal can also be used to give extra volume and penetration when required. 4. 1/4in Single Track: This compression effect pedal adopts 1/4in monophonic track jack for signal input and output. 5. Aluminium Alloy: This bass compression pedal is made of premium aluminium alloy in high strength, which is sturdy and durable, not easy to break. Specification: Item Type: Bass Guitar Pedal Material: Aluminium Alloy Power Requirements: 9V DC Current Centering Negative Signal Input: 1/4in Mono Jack Socket Signal Output: 1/4in Mono Jack Socket Current Consumption: 50mA Product Size: Approx. 12.1 x 9.5 x 3.9cm / 4.8 x 3.7 x 1.5in ( Manual Measurement, Slight Error May Exist ). Package List: 1 x Bass Guitar Pedal1 x Foot Pad