The ARRI Power Distribution Module PDM-1 adds four 3-pin 24 VDC outputs, two 2-pin 12 VDC outputs, and one 12 VDC twist D-Tap output to your ALEXA 35 camera. It mounts directly to the back of the camera without the use of cables and requires a nested B-mount battery adapter (not included) to pass power through to the module and camera.