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: Model: FLP2 Input Impedance: 1M Ohms Output Impedance: 10K Ohms Power Supply: External AC adapter delivering 9V DC regulated minimum 300mA Material: Metal colour: As shown Package Contents: 1 x -2 (SOS)LOOP MINI effector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.