With 2 x M6 mounts on top and 2 x 1/4" mounts at the base, you can attach any kind of video light to the housing or mount the housing to a tray/handle. 
 
The lens adapter enables attaching the filters and lenses. 
Aluminium alloy CNC made high-quality and security smartphone tripod mount adapter. CNC machined from aerospace aluminium alloy. Compatible with SeaTouch 4 MAX housing
Unique design, Made for Underwater smartphone housing
Scalable
 
Reminder: This product is for use with SeaTouch 4 MAX/SeaTouch 4 MAX Plus housings. It is not compatible with the Platinum, as this already has a built-in lens adapter.