GoPro HERO 4 BLACK Mode D'emploi page 78

/ Camera Housing
Your HERO4 Black camera comes with two types of backdoors:
Standard Backdoor and Skeleton Backdoor.
The Standard Backdoor makes the housing
waterproof to 131' (40m). Use this door when you
need to protect the camera from water, dirt, sand
and other environmental hazards.
The Skeleton Backdoor (non-waterproof)
provides better sound quality by allowing more
sound to reach the camera's microphone. It also
reduces wind noise at speeds up to 100mph when
mounted on helmets, motorcycles, bikes and
other fast-moving vehicles. Use this backdoor
only when sand, excessive dirt/dust and water
damage are not a risk. This backdoor is also
recommended for use inside vehicles.
PRO TIP: Apply Rain-X
camera housing lens to prevent water spots from forming when using
your camera in rain or water.
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or a similar anti-beading solution to the
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