The caline cp-79 Wolfpack Overdrive/Boost pedal is inspired by the classic Tube screamer pedal, which adds a booster switch that provides clear and smooth tones. Tube screamer is a very powerful tone-shaping tool and a internal supply voltage step-up which allows more dynamic range and headroom with tight bass tones. It is also a great low to medium gain overdrive and great clean boost. This pedal truly simulates the smooth overload characteristics of a good vacuum tube amplifier.Features:Tube screamer based overdrive circuitry allows the pedal to realistically emulate the smooth overdrive characteristics of a good vacuum tube amp.With VOL, TRE, Gain and Boost control, the pedal is a low to medium overdrive and great clean boost.Overdrive/Boost foot switch for cutting off the extra low frequency to make tone cleaner.True bypass provide transparent tone, with LED light to indicate effect or bypass status.With aluminum alloy shell, durable and stable, exquisite and portable.Specifications:Color: BlueMaterial: Aluminum AlloyPower Supply: DC 9V power adapter(center negative) or 9V battery(both are not included)Current consumption: 30mAProduct Dimensions: 11.9 * 9.4 * 3.8cm / 4.7(L) * 3.7(W) * 1.5(H)inItem Weight: 0.35kgs /12.35ozNote: Power supply not included. Please use the 9V power adapter whose polarity is negative center otherwise, the product may not work properly. Package List: 1 * Effect Pedal 1 * User Manual(English & Chinese)No Duty to Canada and USA FAST 'N FREE USA ShippingShips from Canada