Features: Adjustable pupil distance and sight distance, satisfying different groups of people. Easy to install your cell phone onto the 3D glasses. Magnet Trigger works for Google Cardboard. Detachable Camera Cranium aims to experience AR (enhance reality) or application of other camera support. Heat dissipation is useful for extending VR headsets lifespan. You can adjust the headstrap to fit for your head and get a comfortable condition. PU material is suitable for face size and its comfortable for long time wearing. Suitable for Android and IOS smartphones whose screen is between 4.5-6 inches.