Balanced/unbalanced Smart direct input box with ultra low distortion,it quietly transfers the sound of guitar or bass directly to the audio system Balanced/unbalanced output,gain switch,cabinet simulator and ground lift function included Full metal shell. True bypass. Features and Specifications Mini effect pedals pack an incredibly BIG sound into a very small package. Very small and exquisite Full Metal Shell True bypass Input: 1/4 inch monaural jack (impedance: 1M Ohms) Output: 1/4 inch monaural jack (impedance: 470 Ohms) Power Requirements: AC adapter 9V DC (center minus plug) (Not Supplied) Current Draw: 40 mA Colour:black Material:Aluminum alloy Size:93 x 42 x 52mm Weight:480g Package Contents: 3 x Guitar Effect Pedal 3 x English manual 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.