ENO Reverb Guitar Effect Pedal True Bypass Features: Allows you experience any reverb from Spring, Plate, Room, Hall, Ducking, Echo to Space sounds, etc. Magnalium alloy housing, good durability. Mini size, compact and space-saving. Durable jacks and foot switch. True bypass design, minimizes tone loss and get more control of your pedal. Designed with on / off LED, instructs effects or bypass status. With 4 adjustable knobs: Level, Time, Wave-band, Dry/Wet, 0.25in monaural jack. DC 9V adapter power supply, polarity is positive pole outside and negative pole inside available. Specification: Material: Magnalium Alloy Input: 0.25in monaural jack (impedance: 470K ohms) Output: 0.25in monaural jack (impedance: 100 ohms) Power Requirements: AC adapter 9V DC(Polarity is positive pole outside and negative pole inside available) Current Draw: 50mA Product Size: 9.1 * 3.6 * 3.6cm / 3.6 * 1.4 * 1.4in Product Weight: 144g / 5.1oz Package Size: 11 * 6.5 * 5cm / 4.3 * 2.6 * 2in Package Weight: 167g / 5.9oz Package List: 1 * Reverb Pedal 1 * Cloth Bag 1 * User Manual (English & Chinese) Note: Please use the 9V power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly.