niceEshop(TM) Clear View Skeleton Open Side Protective Housing Case With Lens for Gopro 3+ and Gopro 4 Open side to allow cables to be plugged into your camera for live-feed video, charging, cooling and enhanced audio at low speeds Material:PC;Size:6.5x6x4cm/2.55x2.36x1.57inch The flat glass lens enhances clarity Adopted high light transmittance material,it will not affect photography effect Could capture vivid images as we adopted high transmittancy material