TEEFAN Portable Universal Plastic Google Cardboard 3D VR Headset for Smartphone Rich functional and made of high quality plastic. You can get the best 3D immersion experience after focal and pupil distance adjustment. The magnet works based on app, it helps to control the mobilephone easily while the phone installed into the headset. The full amount straps wears comfortable and decrease the press on bridge of nose while watching movies or playing games. Phone screen size within 6.0 inch is matchable.