Features: Classic distortion tone. 2-stage distortion design provides higher degree of distortion. True bypass. Powered by AC adapter. Mini and portable, enclosure is aluminum alloy shell. LED indicator shows the working state. Rubber pads on the backside is anti-skid, which enhances the stability and avoids friction between the effect pedal and the ground. Specifications: Brand: KOKKO Model: FDS2 Main Material: Aluminum alloy Input Impedance: 1M Ohms Output Impedance: 10K Ohms Power Supply: External AC adapter delivering 9V DC regulated minimum 300mA Item Size: 9.4 * 5.1 * 5.3cm / 3.7 * 2 * 2.1in Item Weight: 180g / 6.4oz Package Size: 10 * 7.5 * 6.2cm / 3.9 * 3 * 2.4in Package Weight: 219g / 7.7oz Package List: 1 * Guitar Effect Pedal 1 * User Manual(English) Note: Please use the 9V power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly.