Vicdozia Expansion Size Waterproof Housing Case Protective Cover with Extended Back Door for Gopro Hero 4 3+ LCD Screen BacPac Expansion Battery Pack Compatible WithIt works with GoPro Hero 4 3+ 3 with extra BacPac LCD Screen or GoPro Expansion Battery BacPac on. Durable and WaterproofWater-resistant, with corrosion-resistance and anti-rust materials. Around rubber ring for excellent full sealed effect. No matter in water or over the water, shooting clearly and will not damage your camcorder. Expansion Version BacPac BackdoorThis is a Housing Case with Extended BacPac Backdoor for Protecting and Waterproof. Please noted, this BacPac Backdoor with NO Touch Function & IT IS NOT COMPATIBLE WITH ORIGINAL GoPro STANDARD HOUSING CASE! Well Made CaseHigh transparent material can keep clear photo shooting, so you can capture vivid images for water sports activities. Package IncludesExpansion Size Housing Case X 1; Buckle Mount Base X 1; Long Screw X 1(This is not a standard housing case, please confirm it when you purchase)