Features:- Built-in operation amplifier with low noise, natural and clear sound.- 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 a battery or AC 9V adapter.- 3 adjustable knobs.- Depth knob: control depth of effect sound.- Volume knob: control volume of effect signal.- Speed knob: control speed of chorus effect.Input Impedance: 100 kohmOutput Impedance: 150 ohm on max volumeRecommended Load Impedance: 10 kohmEquival Input Noise: -90 dBu or lessCurrent Draw: 5.5 mA (DC 9V)Package Weight : 330 G / 11.64 OuncesPackage Dimensions (L*W*H) : 143*92*72 MM / 5.63*3.62*2.83 InchesRetail Packaging: Yes, General BoxPackage Include:1 x Guitar Effect Pedal1 x Battery1 x User Manual