Amazon.com : Waterproof BacPac Back Door Case Compatible with GoPro BacPac LCD Screen/Expansion Extended Battery BacPac, for GoPro Hero 4/3+ Original Standard Waterproof Housing Case : Electronics
Amazon.com : Suptig Replacement Waterproof Case Protective Housing for GoPro Hero 4, Hero 3+, Hero3 Outside Sport Camera for Underwater Use - Water Resistant up to 147ft (45m) : Electronics
Amazon.com : SOONSUN Frame Mount Housing Case with External Lavalier Lapel Clip-on Microphone for GoPro Hero 3, Hero3+, Hero 4 Black White Silver Action Cameras : Electronics