For a camcorder of its GoPro

Super accessories. Very useful.
it eliminates the need of WiFi and connected to SmartPhone App, to frame or set up the camera.
Good screen is of sufficient quality (resolution or number of colors) to see what the camera sees.
However, this is not an HD screen of course.
But it can be deactivated or reactivated at will to save battery if necessary.

Thanks to this, you can use this as a little GoPro camcorder or a small waterproof camera.
It allows thanks to its integrated HP to view previously recorded movies.

A absolutely take if you're lucky enough to have the means.