Kenko 72mm Economy Multi Coated UV Filter Brand_Savage and offers battery-free operation

and offers battery-free operation

It simply snaps on to the Hero3 waterproof housing

Designed for use with iOS and Android devices

so you can mount it to the cold shoe or threaded female 1/4"-20 accessory port of your camera

Kenko 72mm Economy Multi Coated UV Filter Brand_Savage and offers battery-free operationBlocks UV Rays Reduces Photographic Haze Protects Lens from Dust, Moisture and Scratches Multi Coated Surface Kenko Economy multi coated UV filters absorb ultraviolet rays which often make outdoor photographs hazy and indistinct. A low cost multi purpose filter that can also serve as a permanent lens protector.