SWIT KA-S30B, HIGH LOAD WITH MULTI-SOCKETS HOT-SWAP PLATE, FOR 14V B-MOUNT BATTERY TO V-MOUNT DEVICESB to V mount Hot swap Plate KA S30B is a B mount to V mount conversion plate, allows you to use B mount batteries of 14. 4V voltage to power standard V mount cameras and video gears. The KA S30B has battery cells inside, and when you changing battery, the plate will take over the power supply until a new battery is mounted on. So you don t need to switch off the cameras with this hot swap plate. 14. 4V Voltage to Cameras Use Bi voltage B mount