1、NFC Projection Phone Case: With innovative NFC technology, this projection phone case features an ink screen with low power consumption. Even if the phone case is removed, images can be retained indefinitely on the display screen. 2、3.7 Inch Screen: This screen projection phone case features low power consumption, no thermal use, no radiation display, lasting image retention, and other functions. NFC technology ensures fast content transfer to the 3.7 inch screen. 3、Convenient to Use: This phone case features a classic and practical design, making it easy to assemble and disassemble. Provide accurate opening design, allowing you to easily access all buttons and ports, and offer non slip texture. 4、Innovative Pattern: With this screen projection phone case, you can quickly upload your favorite photos and designs, enhance your mobile phone gaming experience, and make your device a true reflection of your personality. 5、Perfect Compatibility: NFC electronic ink screen phone case, perfectly fit for iOS 14 PROMAX phones. Its classic design enhances the appearance of the device, supports a wide range of apps, and provides a seamless user experience. Item Type: NFC Projection Phone Case Projection Screen Size: 3.7 Inch Applicable Model: For iOS 14 PROMAX Special Feature: Change patterns through APP, project images to the back of the phone case with NFC technology, no need for battery power 1 x NFC Projection Phone Case 1 x User Manual