Features:High gain makes the distortion sound excited.Fully analog circuit (3 gain stages).FET simulate the characteristic distortion of tube amplifier.Active middle frequency EQ circuit.True bypass design, minimizes tone loss and get more control of your pedal.Aluminum alloy housing, good durability.LED indicator shows status of effect and battery condition.The pedal can be powered by 9V battery or AC 9V adapter.4 adjustable knob:Tone knob: control the amount of high frequencyGain knob: adjusts the amount of distortionScoop knob: control the amount of middle frequencyLevel knob: control the level of the distorted signalSpecification:Color: RedInput impedance: 1M OhmsOutput impedance: 10K OhmsPower: 9V battery or 9V AC adapter (not included)Product size: 11.7 * 6 * 3cm / 4.6 * 2.4 * 1.2inProduct weight: 237g / 8.4ozPackage size: 12.5 * 8.5 * 5.5cm / 4.9 * 3.3 * 2.2inPackage weight: 298g / 10.5ozPackage List:1 * HG-6 effect pedal1 * User manual (English & Chinese)