Features: Adopt HD zoom optical technology, no battery needed. Compact size and lightweight, easy to carry especially suitable for watching 3D movies and 3D effect is stronger. Relieve your eyes from uncomfortable and tired feelings when in a long time watching. Great for elders to read newspaper in the watch the news on the Internet as a magnifying glass. Type: Phone Screen Amplifier Material: Plastic + 3D Lens Size: 18cm x 15cm/7.09" x 5.91" (Approx.) Screen Size: 8.2" Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Please avoid using in direct sunlight or strong light, avoid light cause is not clear, it will display better in the dark light environment. Do not use hard wipe scratch the lens, when not in use, please use a soft cloth to protect the lens. Adjust the distance from mobile phone frame to the lens and angle, adjust the focal length, lens angle, in order to achieve the best view and optimal amplification effect and the best definition. The best watch angle is vertical to the lens, a distance of 0.5 meters it the best watch distance. Because the lens is larger, the mirror slightly reflective phenomenon, please adjust the brightness of the light and the angle of the light. Package Includes: 1 x Phone Screen Magnifying Glass HD Amplifier