XCSOURCE Waterproof Back Door For Gopro Hero 3 Bacpac Touch Panel LCD Screen OS70 Made of High Quality Plastic. Waterproof and protect your Hero3 Bacpac Panel LCD Screen. With it, you can view real-time images captured by the camera. The Backdoor is specially designed for Bacpac LCD screen, if you already have the normal housing shell case, you can buy this backdoor for the LCD screen.