Features: Fully analog circuit. A broader adjustable range. 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: 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: 177g / 6.2oz Package Size: 10 * 7.5 * 6.2cm / 3.9 * 3 * 2.4in Package Weight: 206g / 7.3oz 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.