KMA Machines Active AB/Y Switch; Active Switching Pedal for Electric Guitar & Bass; switches or combines a mono input signal between two separate outputs, switches or combines two separate input signals into one output; Phase and Y direction switches for greater flexibility; Active silent relay-based soft switching, heavily reduces mechanical noise and pops; Durable compact enclosure for years of reliable switching; Controls: ; Push Buttons: ; LED: A, B, Y; Display: ; Footswitches: A / B, A & B; Switches: Phase, Y Direction (Y>AB/AB>Y); Connections: A, B & Y (3 x 1/4" Jack); Power Supply connector: Barrel Connector 5.5 x 2.1 mm, center negative; Current Draw: 55 mA; powered by a 9 V DC Power Supply (not included); suitable optional Power Supply: Item no. #409939; True Bypass; Dimensions (W x D x H): 112 x 65 x 56 mm (4.41" x 2.56" x 2.2"); Weight: 250 g (0.55 lbs); Handmade in Germany; Note: Battery operation is not supported