feature: Provides warm and natural tube overload sound. By turning the knob, you can enhance the guitar amplifier for colorful tones or overload for unique pedal sounds. Real bypass hardware switching. The LED indicator shows the effect status. Powered by the AC adapter. Mini portable, the shell is aluminum alloy shell. The rubber pad on the back is non-slip to increase stability and avoid friction between the effect pedal and the ground. Specification: Brand: KOKKOModel: FOD3Main material: aluminum alloyInput impedance: 1M ohmOutput impedance: 10K ohmPower supply: external AC adapter provides 9V DC regulated minimum 300mAItem size: 9.4 * 5.1 * 5.3cm / 3.7 * 2 * 2. 1inItem size: 177 grams / 6.3 ouncesPacking size: 10*7.5*6.2cm/3.9*3*2. 4inPackage weight: 214g / 7.5oz Packing list: I22151 * Guitar effect pedal 1 * User Manual (English)