This SmallHD PWR-ADP-BB-4K-DUALVM smart battery bracket slides right down the Arca Swiss SmartRail on the back of your 4K monitor and plugs directly in for power (no cable required). Both 14v and 26v batteries are supported and this plate allows for hot-swapping between the two battery plates AND between the plate and the 3-pin XLR power port on the monitor itself.