Support your compact point-and-shoot or action camera and a lighting arm with this Compact Digital Tray for Underwater Photography from Sea & Sea.
It is included with the YS-03 Universal Lighting System and is offered as a separate accessory here.
The tray offers a 1/4 -20 mounting screw for a small camera in its underwater housing as well as a mounting point for one of Sea & Sea's optional Compact Flex Arms, which can hold a strobe or video light.
These arms are attached via the optional #22134 bracket shoe.
The 1/4 -20 camera mount is attached to a wheel that sits underneath the tray and enables you to turn the screw for insertion into the housing's tripod mount.