This Dual Power System with a Canon LP-E6 Type Dummy Battery is used to power your Canon DSLR camera using two available Canon LP-E6 Battery Packs (not included). One end of the Dual Power Grid System has a dummy LP-E6 battery that is inserted into the camera’s battery bay. The other end is connected with an 18″ cable and features a space-saving dual-sided battery plate that mounts one LP-E6 Battery Pack on each face. The batteries snap securely into the plate. A clamp allows you to mount the unit to Light Weight Standard (LWS) 15mm support rods (not included). A built-in blue LED indicates sufficient voltage supply to the camera. You can hot-swap the batteries without having to power off your camera. Made in the USA.