Sliding design: Stretch the silicone round button to reveal the screen. The sliding screen mode protects the display and makes the unit more suitable for transport. HD display screen: Fresnel mirror screen with optical HD zoom technology enlarges the image by 3 to 4 times, providing clearer viewing on a smartphone screen. High quality materials: ABS plastic chassis and Fresnel mirror are strong and durable, delivering higher definition. The raised frame offers an adjustable viewing angle, and the non-slip silicone pad protects and stabilizes the phone. Simple operation: The screen amplifier doubles the screen size, enhancing movies and videos on your HD smartphone. A Bluetooth keyboard can be added to control playback and typing. Designed for use with standard smartphones, this accessory increases screen size and viewing comfort while maintaining a lightweight, portable form. Use scenarios: - While traveling (plane, train, or car) to watch videos on your phone without holding it. - At home on the couch or in bed for immersive video viewing with a stable stand. - At a desk or in meetings, paired with a Bluetooth keyboard to type notes or control playback while watching content.