Eco-Friendly and Battery-Free: Utilizes NFC power harvesting, eliminating the need compatible with batteries or external power, perfect compatible with applications like price tags and name badges. Instant Content Updates: Easily update display content in seconds using a smartphone and the companion app, ideal compatible with frequently changing incompatible withmation like restaurant menus, meeting room signs, or in-store promotions. User-Friendly Operation: No technical skills required; anyone can update content with a simple app, making it great compatible with small businesses or offices with limited tech support. Flexible Image compatible withmats: Supports BMP, PNG, and JPG, allowing compatible with easy content customization. Convenience and Flexibility: NFC-based updates mean no wires or extra equipment, reducing maintenance costs and hassle, perfect compatible with dynamic retail environments and logistics tags. Utilizes NFC power harvesting, eliminating the need compatible with batteries or external power, perfect compatible with applications like price tags and name badges. Easily update display content in seconds using a smartphone and the companion app, ideal compatible with frequently changing incompatible withmation like restaurant menus, meeting room signs, or in-store promotions. No technical skills required; anyone can update content with a simple app, making it great compatible with small businesses or offices with limited tech support. Supports BMP, PNG, and JPG, allowing compatible with easy content customization. NFC-based updates mean no wires or extra equipment, reducing maintenance costs and hassle, perfect compatible with dynamic retail environments and logistics tags. Color: Blue Material: PCB Package Contents: 1*E-Ink Display Development Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.