D-Box (C300mkII, V-Mount) is a custom version of the popular D-Box that adds power distribution, standardized remote start/stop, and hot swap abilities for the Canon C300mkII. Two 12 inch (30cm) cables exit the power plate with one going to the 4pin LEMO power plug and the other going to the Remote port. There is a LANC control board inside the D-Box which communicates with the camera and allows any ARRI standard start/stop trigger to be used with the 3pin Fischer port.