Utilizes NFC power harvesting, eliminating the need for batteries or external power, perfect for applications like price tags and name badges. Easily update display content in seconds using a smartphone and the companion app, ideal for frequently changing information 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 for small businesses or offices with limited tech support. Supports BMP, PNG, and JPG, allowing for easy content customization. NFC-based updates mean no wires or extra equipment, reducing maintenance costs and hassle, perfect for 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.