1. True Bypass design, with aluminum alloy casing 2. Power Requirement: 9V DC center negative 3. Current consumption: 30mA 4. Product Dimensions: 11.2x6.4x3.4cm 5. Weight:0.23kg Introduction: There are four main control knobs on the pedal - Gain, Treble, Vol, and Bass. Gain allows you to go from a barely noticeable boost to a boost with a of fuzz. The Treble and Bass controls are a great way to cut and boost your frequencies even further. So combined these controls allow a great deal of versatility. The CP-54 is durably constructed and should to the pressures of gigging despite its low price. Note:Please use the power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly. Colour:As Shown Material:aluminium alloy Package Contents: 1 * Electric Guitar Effect Pedal 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.