Joyo JF-329 Iron Loop; Effects Pedal for Electric Guitar; Ironman Series; the ring on the pedal shows the length of the recorded loop, which makes overdubbing a lot easier because man can see where the loop begins and ends; light and compact; Controls: Level; LED: Effect On; Footswitches: Effect Bypass; Connections: Input (1/4" Jack), Output (1/4" Jack); Power Supply connector: Barrel Connector 5.5 x 2.1 mm, center negative; Current Draw: 160 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): 43 x 73 x 50 mm (1,69" x 2,87" x 1,97"); Weight: 220 g (0,49 lbs); Note: Battery operation is not supported