Feature:1. Effect Pedal: Can achieve a warm, natural tube overdrive sound effect to make your playing more attractive.2. Free Control: Equipped with 3 knobs, the guitar effect pedal can accurately control DRIVE, LEVEL and TONE.3. Low Noise: Adopting pedal switch, the hardware promises low noise, and excellent sound quality as well.4. Metal Shell: Painted with green colour, the sturdy metal shell offer secure protection for long term use.5. Easy to Carry: Designed to have small size and light weight, both the storage and carrying are very easy.Specification:Item Type: Guitar Effect PedalMaterial: MetalColour: GreenInput Impedance: 1 megohm. Output Impedance: 10 kilo ohms. Product Power Supply: External 9V AC power adapter (not included in the product). .Package List:1 x Guitar Effect Pedal1 x User ManualNote:Note that the positive and negative poles of the power supply must be the same as the positive and negative poles of the effect pedal.