The iKan USB Control Grip enables remote control for Canon EOS DSLRs and EF lenses. In addition to video record start/stop, the grip's remote functions include focus, iris and live view controls. The control grip interfaces with the camera via USB and is compatible with most Canon DSLRs, including the 7D, the 5D Mark II and the 5D Mark III. The 1/4"-20 threaded sockets on the top and bottom makes it easy to integrate the grip with a camera support rig. The grip is powered by two AA batteries.