The Green Lion Smart E-Ink Case 4" Custom Display is a premium protective case designed for the iPhone 17 Pro and iPhone 17 Pro Max. Its innovative 4-inch E-Ink display lets you personalize the back of your phone with photos, artwork, QR codes, or custom designs. Powered by Passive NFC technology, the display requires no built-in battery and consumes power only when updating the image. With a sharp 528 × 768 resolution, 236 DPI clarity, and support for four display colors, it delivers crisp and stylish visuals. The case is fully compatible with MagSafe and wireless charging for everyday convenience. Built from durable TPU and PC materials, it offers reliable protection with a raised camera bezel for added safety. Easily customize your display through the smart AI-powered companion app for a unique and personalized smartphone experience.