HOW TO USE IT?Put your smartphone in，then open the 3D apps / games / moviesClose the gogglesPut the goggles on your head.Adjust the lenses to suit your pupils， make sure the screen is clear and you feel comfortable.Enjoy it! Description:This item does not have the Magnet Parts so it can not control like the Google Cardboard 3D.But you can use this item view 3D movie and 3D game on your cellphone.Parents who pay attention， the manufacturers latest， no longer comes with the disc ，all integrated in APP software resources inside and more convenient to watch downloadPerfectly compatible with 4.7-6.1 inch smartphone market iscompatible with more than 90% of the mainstream mobile phone ，Samsung note series ， iphone5s， iphone6， millet ， Huaweiand other mobile phones the size of less than 154 * 78mm can be usedDiameter 30mmPupil Distance PD adjustableFocal Distance FD adjustableSize:170*120*105mmThis paragraph does not contain NFC component (NFC module automatically recognizes only open the program，click on the icon to open the step is omitted software， other experiences are the same)Cardboard applications can be run on most modern Android Android phones.Phone needs to run Android 4.1 (Jelly Bean) or more versions of Android.It can work with Android ISO system cell phones which can be 4.7" - 6.1 inches.