MazeTechno LCD BacPac External Monitor Display Viewer button control for GoPro HERO 4, 3+, 3 with Waterproof Backdoor cover for HERO 4 and 3+ This LCD bacpac external display viewer monitor non-touch screen is specially designed for GoPro HD Hero 4 3+, 3 cameras. ith the help of this product, you can see real-time images captured by the camera Waterproof housing case backdoor ONLY fits for GoPro HD Hero 4/3+, NOT for 3 This LCD bacpac external display viewer monitor non-touch screen is specially designed for GoPro HD Hero 4 3+ 3 cameras,Best replacement for your damaged, cracked, marked or dirty screen Easy to install and remove. Make sure the selecting button and the confirm button on your Gopro. Can display real-time images captured by the GoPro camera and review them. Press the side button to turn ON/OFF and press the button for seconds to enter review mode. Convenient to view photo and video in real time and playback