Features: Portable and durable: The compact and lightweight design, which is easy to carry and install, combined with the durable nature of the E-ink screen, enables the device to show outstanding performance and stability in a variety of application scenarios. Excellent visual experience: The 2.13-inch 250x122p high-resolution screen delivers a reading experience close to paper, with a wide viewing Angle of more than 170°, ensuring that the content is clearly visible regardless of the light conditions. Ultra-low power consumption: The electronic ink screen consumes power only when the content is updated, and supports local refresh function, effectively reducing power consumption and extending the service life of the device, especially for the scene that needs to be displayed for a long time. Environmental protection and energy saving: no backlight, reflective display mode, not only reduces energy consumption, but also reduces the burden on the environment, is a model of green technology products. Power off memory: Unique power off hold function, even if the device power off, can retain the last displayed content for a long time to ensure that the information is not lost. Wide compatibility: Designed for Raspberry Pi 40PIN GPIO interface, it is suitable for Raspberry Pi series and for Jetson Nano motherboard. Meanwhile, SPI communication interface is reserved for easy access for Arduino, for STM32 and other main control boards, and on-board level conversion chip. Compatible with 3.3V and 5V microcontroller interface, strong scalability. Specifications: Display Size: 2.13 inch Communication Interface: SPI Operation Voltage: 3.3V / 5V Display Dimensions: 23.7 x 48.5 mm Outline Dimensions: 65 x 30.2 mm Dot Pitch: 0.194 x 0.194 mm Display Resolution: 250 x 122 pixels Display Colors: Black and White Grey Level: 2 Partial Refresh Time: 0.3 seconds Full Refresh Time: 2 seconds View Angle: >170° Refresh Power (Typical): 26.4mW Resting Current: