Battery Slide Pro Gold Mount (Sony FX9) utilizes a Wc Pro Gold Mount plate which converts battery voltage to 19.5V for the camera, FX9 barrel connector, and 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 Gold Mount batteries. To adjust battery plate position, loosen the thumbscrew and slide. Perfectly fits rear profile of the Sony FX9 for compact packing in camera case.Features 3x D-Tap ports at battery voltage for accessory power and digital fuse which cuts off accessory outputs while leaving the camera powered..