Features:3 working modes: Lo Boost or Boost Off or 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 or 4″Monaural Jack (impedance: 1M Ohms)Signal Output: 1 or 4″Monaural Jack (impedance: 470 Ohms)Power Supply: DC 9V adapter (center minus plug)(not included)Working Current: 20mAItem Size: Approx. 3.5 x 9 x 3cm or 1.4 x 3.5 x 1.2inItem Weight: Approx. 150g or 5.3ozPackage Size: 10.5 x 6 x 4.5cm or 4.1 x 2.4 x 1.8inPackage Weight: 175g or 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 x Effect Pedal1 x User Manual(English and Chinese) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.