- High-Quality Materials: Constructed with high-definition optical lens material and an eco-friendly wooden frame, this screen magnifier offers adjustable viewing angles for a comfortable 3D visual experience. - Large 21-Inch Size: Designed to enhance your viewing experience on notebooks, tablets, and mobile phones, this magnifier measures 19.6 x 14.3 inches (50 x 36.5 cm), featuring a generous 21-inch screen. - Universal Compatibility: This screen enlarger utilizes advanced HD zoom optical technology, making it compatible with laptops, tablets, and mobile devices, providing a versatile solution for all your screen magnification needs. - Eye Protection: With a magnification of 3-4 times, the HD acrylic fresnel lens ensures a clearer image while reducing discomfort and visual fatigue from prolonged screen use. Use Scenarios: - Perfect for watching movies or videos on your mobile device, providing a cinema-like experience without straining your eyes. - Ideal for reading documents or browsing the web on your tablet, allowing for easier viewing and enhanced clarity. - Great for presentations on a laptop, ensuring everyone in the room can see the content without squinting or discomfort.