Features:A representation of the classic Tube Screamer， with an updated JRC4588 chip.The overdrive effect is mellow， mild， smooth and exquisite.True bypass design to minimize the tone loss.Drive， Tone， and Volume Controls:Drive: adjust the degree of distortion;Tone: adjust the intensity of the tone;Volume: adjust the volume of the sound.Aluminum alloy casing with stove varnish finish.Powered by a 6FF22 9V battery or 9V DC power adapter (neither included).Specifications:Color: GreenEffect pedal size: 11.8 * 6.4 * 3.8cm / 4.6 * 2.5 * 1.5inEffect pedal weight: 300g / 10.6ozPackage size: 13 * 7.7 * 6cm / 5.1 * 3.0 * 2.4inPackage weight: 332g / 11.7ozPackage list:1 * Effect Pedal1 * User Manual