The Core SWX <b>CXV-C3MK</b> v-mount plate is specifically designed for select Canon EOS Cine cameras that accept DC 4-pin XLR input including the Canon C300 Mark III and Canon C500 Mark II. It directly mounts to the accessory bay on the rear of the camera, allowing use of 14.4V V-mount batteries while also leaving the camera's battery bay available for a BP-A style pack for hotswapping capabilities. To power additional accessories, it's equipped with two powertaps and one USB.</p>