Specifications: Input: 1/4 Mono Jack (Impedance 510K Ohm); Output: 1/4 Mono Jack (Impedance 1K Ohm); Power Consumption: 10mA; Power Supply: DC9V AC Adapter (Center Negative Plug); Product Size: 9.5 x 4 x 3.5 cm / 3.7 x 1.6 x 1.4 inches Product Weight: 150 g 5.3 oz Note: Power adapter not included. Please use the polarity of the power adapter with the outside polarity and the inner negative polarity. The product may not work properly. Package List: 1 * Guitar Equalizer Pedal 1 * User Manual 1 * Pouch