Battery Slide Pro V-Mount (Canon C300mkIII, C500mkII) utilizes a WC Pro V-Mount plate provides battery voltage to the camera through a 4pin XLR connector and features a custom Battery Slide which attaches directly to the back of the camera without rods. This system retains access to the battery compartment and allows an internal BPU battery to be installed, giving the user the ability to hot swap batteries. To adjust battery plate position, loosen the thumbscrew and slide. DC Input on camera-right side can be used for hot-swapping between block battery and on-board battery.