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