Features:3 working modes: Lo Boost/ Boost Off/ Hi Boost.Lo Boost: Boost a narrow band of high frequencies a little bit; Boost Off: No boost is engaged; Hi Boost: A higher amount of boost is engaged.3 control knobs: VOLUME(adjusts the distortion volume), TONE(adjusts the distortion tone color), DIST(adjust the distortion gain).Micro size and full metal shell, portable and durable.With true bypass footswitch and LED indicator light.Specifications:Material: MetalSignal Input: 1/4″Monaural Jack (impedance: 1M Ohms)Signal Output: 1/4″Monaural Jack (impedance: 470 Ohms)Power Supply: DC 9V adapter (center minus plug)(not included)Working Current: 20mAItem Size: Approx. 3.5 * 9 * 3cm / 1.4 * 3.5 * 1.2inItem Weight: Approx. 150g / 5.3ozPackage Size: 10.5 * 6 * 4.5cm / 4.1 * 2.4 * 1.8inPackage Weight: 175g / 6.2ozNote:The power adapter is not included.Please use the power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly.Package List:1 * Effect Pedal1 * User Manual(English & Chinese)