Features: Delivers a warm, natural tube overdrive sound . With the turn of a knob, you can boost your guitar amp for a rich tone, or overdrive yourself for a unique pedal tone. True bypass hardware switching. LED indicators show effect status . Powered by AC adapter. Small and portable, with an aluminum case. Non-slip rubber pad on the back for added stability and to avoid rubbing the effect pedal against the ground. Specifications: Brand: KOKKO Model: FOD3 Main Material: Aluminum Alloy Input Impedance: 1M Ohm Output Impedance: 10K Ohm Power Supply: External AC adapter providing 9V DC minimum 300mA Product Size: 9.4 * 5.1 * 5.3cm / 3.7 * 2 * 2.1in Item Size: 177g / 6.3oz Package Size: 10 * 7.5 * 6.2 cm / 3.9 * 3 * 2.4 inPackage weight: 214 g / 7. 5 oz Packing list: I22151 * Guitar effect pedal 1 * User manual (English)