This cable features a 2.1mm straight barrel connector on one end and a snap connector on the other to power a pedal directly through its internal 9V battery snap connector. This cable works with any effect that runs on 9V battery including vintage pedals without power jacks. 9V battery snap to 2.1mm barrel connector Custom-designed by Voodoo Lab for optimal performance with Pedal Power Nickel-plated barrel plug secures solid connection to power supply 22-gauge copper wire for superior current handling Coaxial design allows greater cable flexibility Durable PVC insulation ensures long cable life Part# PPBAT