Size and screen area - 21in screen magnifying glass size - Overall length: 19.6 in (50 cm) - Overall height: 14.3 in (36.5 cm) - Screen area: 19.3 in (49 cm) long by 10.5 in (26.7 cm) high Performance and image quality - High-definition zoom optical technology enlarges mobile phone and notebook screens by 3-4 times - Helps protect eyes and reduces visual fatigue during longer viewing sessions - Delivers ultra-clear picture quality with 3D high-definition video dynamic effects Materials and adjustability - Environmentally friendly wooden materials used for the product - Screen magnifier uses high-definition optical lens material - Multiple viewing angles are adjustable to meet different needs Portability and compatibility - Foldable and portable design for easy transport and storage - Compatible with all kinds of computers and mobile phones Usage scenarios - In the living room or bedroom to watch videos from a phone or view content with a larger display - In the kitchen to follow recipes or video tutorials on a smartphone without straining the eyes - Outdoors or while traveling for convenient, enlarged screen viewing on mobile devices