GoPro Hero 3 Silver edition User Manual page 58

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sWAPPinG housinG Doors
Your HERO3 camera housing comes with two types of backdoors—Standard and
Skeleton (non-waterproof).
to change backdoor:
1. Open the backdoor of the housing so that it is hanging downwards.
2. Pull downwards on the backdoor until it snaps free from the hinge.
3. Line up replacement backdoor into the hinge opening.
4. Push upwards on the backdoor until it clicks into place.
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