Feature: 1. SMART NFC PROJECTION SCREEN CASE: The NFC case revolutionizes the way you display content on your device. With an ink screen that consumes very little power, images remain on the display indefinitely without draining your phone's battery, even when the case is removed. 2. 3.7 INCH PROJECTION SCREEN: Low power consumption, no heat work, no radiation display and long lasting image retention. NFC technology ensures fast wireless transfer of content to the phone case's 3.7 inch screen for easy updates. 3. INNOVATIVE AND PRACTICAL: Classic and practical design, easy to assemble and disassemble. Passed drop test, offers a precise opening design for easy access to all buttons and ports, and a non slip grip to ensure your device is both protected and stylish. 4. INNOVATIVE PATTERNS: Elevate your mobile gaming experience with friendly cases. Quickly upload your favorite photos and designs to make your device a true reflection of your personality. 5. COMPATIBILITY: Simply confirm your phone model before ordering to ensure a perfect fit for this smart NFC electronic ink case. Support for a wide range of apps ensures easy installation and a seamless user experience. Specification: Item Type: Smart Ink Screen Phone Case Material: TPU, Glass Phone Case Cast Screen Size: 3.7 Inches Applicable: for IOS 15 Cell Phone Features: Change the Pattern Through App, Cast the Picture to the Back of the Phone Case with the Help of NFC Function, No Battery Power Required. Package List: 1 x Smart Phone Case 1 x Instruction Manual