This long cord, which can expand up to 6" (2m), connects high voltage power to flashes and are used with Turbo battery packs. This cable is designed for Canon Flashes. This cable can be used with any Quantum Turbo battery. Quantum batteries have a host of separately sold connectors to connect with a vast array of flash & digital camera makes and models. Using original Quantum made connectors assures trouble free compatibility with your battery unit.