Hi @ basil, super hunting.
Diving with an assistant at 30 m depth, with a 4K camera and a 4-hour battery is excellent.
Easy for use, with apps available on iPhone and Android.
Information about fish, water temperature, soil configuration is derived from the apps.
It has a removable FishFinder so you can use it independently.
Built-in LED lights, provide fantastic shots.
A really good device.