Welcome to our store! 1.54 Inch Screen: This e-ink display features a 1.54-inch screen with a resolution of 200x200. Compatible with 3.3V and 5V single-chip interfaces. Wide Viewing Angle: This E-paper screen clearly displays images in ambient light, such as lighting and natural light. No backlight is needed, and the viewing angle reaches nearly 170 degrees or more. Display After Power Off: This electronic paper screen can retain the last screen content for a long time after being powered off. 3 Colors: This E-paper monitor supports red, black, and white colors, making it ideal for shelf edge labels, industrial instruments, and other display applications. Widely Compatible: This e-ink monitor with an SPI control interface is suitable for RasPi, Jetson, Nano, STM32, etc. Item Type: E-Ink Screen Material: Electronic Ink, Printed Circuit Board Operating Voltage: 3.3V/5V Grayscale: 2 Screen Size: 1.54 Inch Resolution: 200x200 Communication Interface: 3-Wire SPI, 4-Wire SPI Global Refresh: 14S Screen Size: Approx. 27 x 27mm / 1.06 x 1.06in Viewing Angle: Over 170 Degrees Display Color: Red, Black, White Package Includes: 1 x E-Ink Screen Customer Satisfaction - Customers are our top priority. If you find any problems with the product after receiving it, such as damage or incorrect quantity, please contact us immediately. We will do our best to provide you with satisfactory customer service.