Item Type: Guitar Effect Pedal Material: Metal Colour: Green Input Impedance: 470 kilo ohms. Output Impedance: 10 kilo ohms. Product Power Supply: External 9V AC power adapter (not included in the product). Length: Approx. 94mm / 3.7in Width: Approx. 51mm / 2.01in Height: Approx. 53mm / 2.09in Package List 1 x Guitar Effect Pedal 1 x User Manual 1 x Hook and Loop Fastener 1 x Sponge 1Effect Pedal: This effect pedal can add a warm, natural tube overdrive sound effect to your guitar. 2Free Control: There are 3 knobs, which enable better and accurate control on DRIVE, LEVEL and TONE. 3Low Noise: The application of pedal switch ensures low noise and excellent sound quality as well. 4Metal Shell: Sturdy metal shell covered with green paint will offer secure protection for long use. 5Easy to Carry: Designed to have small size and light weight, the daily carrying are very convenient.