Specification: Color: Black Size: 3D VR Video Glasses: 20 X 14 X 10cm Suitable for Android and IOS smart phones. Package Include: 1x 3D VR Video Glasses 1x Manual Sample question: 1. Why i can not install the phone into the device? The phone case will enlarge the size of original phone, please take the phone case off before you try to assemle the system. 2. The image through the device is blur. a. To protect the lens from dust and scratching during delivery, we had a protection diagphram on lens, please take it off before using. b. Please adjust the focus distance via the nob by the side of the device for regulation until you get clear image. c. Please make sure side by side image is running on your phone for both 2D and 3D movies. d. Make sure the central line of split image on phone align to the split wall of VR headset, fine tuning on left and right is advised. e. Check the surface of your mobile phone and make sure it’s clean.