The P-Tap to Canon 9V Barrel Cable from Bescor allows you to power your Canon EOS C100, C100 Mark II, C300, or C500 camera using a professional P-Tap battery. The cable measures 20" in length and provides a P-Tap connector on one end and a Canon 9V barrel connector on the other end. The cable provides regulated 9 VDC power to power the camera.