Feature

Detachable and waterproof
Transparent for a perfect view for the LCD bacpac
Rubber rings to ensure waterproof function 
With elastic spring & stainless steel made button on the  side
Rubber strips inside to buffer vibration towards the LCD
Compatible for GoPro Hero 3+ Waterproof  housing,(Not for Hero 3 waterproof housing). Please compare with the description from the picture detail

 

And Please Note: Only purchase this item when you have a LCD bacpac.
 
Package Includes:
1 x Backdoor for Gopro Hero 3+ waterproof housing.