【NFC Sensitivity & No Charging Required】Equipped with NFC technology for easy pairing and seamless interaction, with no need for charging, making it hassle-free to use 【Innovative E-Ink Smart Screen】Utilizes advanced e-ink technology for clear, low-power display. Enjoy a DIY customizable screen to showcase personalized content directly on your phone case 【High-Definition 4-Color Display】Features a high-definition display with four vibrant color options (Black, White, Red, and Yellow) for dynamic, eye-catching visuals 【Precision Cutouts for Perfect Fit】Designed with precise cutouts to ensure easy access to all phone functions and ports without compromising on style or functionality 【Durable & Premium Materials】Constructed with high-quality PC, silicone, and glass materials, ensuring the case is both sturdy and flexible for long-lasting protection and ease of use Specifications:? Screen Size: 4 inches Display Technology: E-Ink (Ink Screen) Resolution: 800 x 460 PDI: 236? Connectivity: NFC Power Source: No charging required (NFC-powered)