We modified existing GoPro waterproof housing for very popular 4K format cameras such a HERO4 Black, Hero4 Silver, HERO3+and added waterproof HDMI connector, which is allowed to use the capability of HDMI signal from the camera.
Now you can:
Plug any our HDMI underwater external monitors to the bulkhead connector from GoPro housing, and control precisely subject of you shooting
Can connect extension HDMI surface cable, up to 30 meters, and send live view video for big screen or recorder device
“There are a lot of divers who use GoPros now but having the lights and HD monitor adds another $3,500 to $4,000 to the cost. Still many of the divers who travel to exotic dive locations can afford that cost and have a need to keep their baggage weight down. This rig cuts 40 lbs of weight and can fit into my carry-on luggage. It eliminates the need for a large rolling case that carries my housing for a Canon HD camcorder.”