Feature Highlights: 1. No Backlight, Persistent Display – Once powered, it maintains the last screen image without needing continuous power. 2. Extremely Low Power Consumption – Energy is only used when the screen refreshes, making it ideal for battery-powered projects. 3. SPI Control Interface – Easily connects to popular controller boards like Arduino, Raspberry Pi, Nano, or STM32. 4. Built-in Level Conversion – Compatible with both 3.3V and 5V microcontrollers, so no extra circuitry is needed. 5. Complete Resources Included – Comes with a detailed manual and sample code for quick setup and programming. Product Details: This 2.9-inch E-Ink display offers a clear, easy-to-read black-and-white screen that holds an image without power. It’s perfect for low-power applications like smart labels, sensors, or portable devices. With local refresh support, updates are fast and energy-efficient. The SPI interface makes wiring straightforward, and the onboard level shifter ensures compatibility with most development boards. Whether you’re prototyping or building a final product, this display is reliable and simple to integrate. Specifications: - Working Voltage: 3.3V / 5V - Communication Interface: 3-wire SPI, 4-wire SPI - Dimensions: 89.5 × 38mm - Display Size: 66.89 × 29.05mm - Resolution: 296 × 128 pixels - Display Color: Black and White - Gray Levels: 2 - Partial Refresh Time: 0.3s - Refresh Power Consumption: 26.4mW (typical) - Sleep Current: <0.01µA (near zero) - Viewing Angle: 170° - Frame Color: Blue - Material: Plastic + Metal Package Includes: - 3 × E-Ink Displays - 3 × 20cm Connection Cables Only the items listed above are included. Note: Slight color variations may occur due to lighting or screen differences. Dimensions may have a tolerance of +/- 1–3mm.