• 【4-Inch HD E-Ink Display】Features a high-resolution 800x416 four-color e-ink screen (black / white / red / yellow), delivering clear and vivid visuals on the back of your phone case
• 【Smart NFC Power】No battery needed – powered by NFC radio frequency, the screen stays functional even without charging or cables
• 【Customizable DIY Display】Easily update and personalize the back screen with your favorite photos, artwork, or AI-generated images through the exclusive app
• 【Exclusive App Control】Switch styles, refresh content, and enjoy unlimited creativity anytime, enhancing your phone with a dynamic and personal touch
• 【Premium Craftsmanship】Crafted from premium PC and silicone, with a glass screen, designed with an aluminum alloy lens frame and buttons for durability and a refined tactile feel, combined with excellent injection molding workmanship

Specifications:

• Screen Type: E-ink
• Swipe mode: App
• Display colors: Black / White / Red / Yellow
• Drive: NFC
• Screen Resolution: 800 x 416 pixels