Features: 1.Ultimate drive effect pedal gives you rich, close to distortion overspeed, more than what diode tube amplifier can provide 2.Open this pedal you can find the kind of response and wide harmonic overdrive tube amplifier 3.Three knobs are separately used to adjust the volume of sound (gain knob), adjust the degree of distortion (volumn knob) , and adjust the strength of the tone(tone knob) 4.The True Bypass designs will minimizes tone loss to realize the original sound of your guitar 5.Mode button make mode high frequency is higher than mode low, LED can visually indicate the working status of the guitar pedal, powered by DC 9V adapter, convenient to use specification:Item Type: Ultimate Drive Material: Shell: Aluminum alloy Interface: Brass Components: Polyester fiber Circuit Board: Glass fiber Connector: ABS plastic Input Impedance: 1m Ohms Output Impedance: 1k Ohms Running Current: 6mA Power Supply: DC 9V Adapter(not include) PackageList:1 x Effect Pedal 1 x User Manual