1.Screen Magnifier Dimensions: 21-large size universal screen magnifier suitable for laptop/tablet/mobile phone. 19 inches x 14.3 inches (50x36.5 cm), the screen is 21 inches.Protect your eyes: The screen magnifier uses high-definition optical lens material to magnify 3 times on the phone screen, and can adjust multiple viewing angles. It can enjoy 3D vision away from the screen and relieve the discomfort and visual fatigue caused by focusing on a small screen for a long time.Watching 3D 2.Protect your eyes: The screen magnifier uses high-definition optical lens material to magnify 3 times on the phone screen, and can adjust multiple viewing angles. It can enjoy 3D vision away from the screen and relieve the discomfort and visual fatigue caused by focusing on a small screen for a long time. 3.Watching 3D movies or learning to work: you can easily enjoy home theater-like effects. The high-definition images are clear and realistic, which solves the very uncomfortable problem of mobile phone notebook screens and effectively protects eyesight. It is different from all screens on the market. Our screen is developed by years of optical technology, no matter how long it takes, it will not be dizzy. 4.3~4 times magnifying glass: The magnifying glass that s hands can reach 3 times magnifying glass. When reading fine print, 3X magnification is considered the most comfortable magnification. Made of durable ultra-high-definition acrylic lens + environmentally friendly wooden frame, high-quality materials.