B-Stock, Mad Professor The Green Wonder Overdrive; Effects Pedal for Electric Guitar; Versatile overdrive/booster pedal with large headroom; harmonizes with both single-coil and humbucker pickups; suitable for high gain; bass and treble controls for maximum flexibility; Controls: Volume, Drive, Bass, Treble; Push Buttons: ; LED: Effect On; Display: ; Footswitches: Effect Bypass; Connections: Input (1/4" Jack), Output (1/4" Jack); Power Supply connector: Barrel Connector 5.5 x 2.1 mm, center positive; Current Draw: ca. 4 mA; powered by a 9 V Battery or a 9 V DC Power Supply (not included); suitable optional Power Supply: Item no. #409939; True Bypass; Dimensions (W x D x H): 78 x 125 x 61 mm (3,07" x 4,92" x 2,4"); Weight: 360 g (0,79 lbs); Made in USA, B-Stock with full warranty, may have slight traces of use