Colorcross 3D Video Glasses Universal Google Cardboard Virtual Reality for 4-6"Smartphones (Home 3D Glass(Black)) Wonderful 3D picture of the screen effect, awesome 3D feeling Convenient to use: can watch at anytime anywhere whether sitting, lying or standing It can work with arduino Android ISO system cell phones which can be 4 - 6 inches Use ABS and spherical resin lens materials without stimulation plastic sheet, environmental Secret images, other people can not see anything except to the wearer himself.