Features: 1.54 Inch Screen: This ink display adopts 1.54 inch screen with the resolution of 200x200. Compatible with 3.3V and 5V singlechip interface. 2.Wide Angle: This E paper screen can clearly display images in ambient light such as lighting and natural light, backlit is not needed, and the viewing angle reaches almost 170 degrees or more. 3.Display after Off: This electronic paper screen can keep the last screen display content for a long time after power off. 4.3 Colors: This E paper monitor supports red, black, white colors, ideal for shelf label, industrial instrument and other display applications. 5.Widely Compatible: This ink monitor with SPI control interface, suitable for RasPi, for Jetson, for Nano, for STM32, etc. specification:Item Type: Ink Display Material: Electronic Ink, Printed Circuit Board Operating Voltage: 3.3V/5V Gray Level: 2 Screen Size: 1.54 Inches Resolution: 200x200 Communication Interface: 3 Wire SPI, 4 Wire SPI Global Refresh: 14S Display Size: Approx. 27 x 27mm / 1.06 x 1.06in Viewing Angle: Over 170 Degrees Display Color: Red, Black, White PackageList:1 x InkDisplay Note1. The FPC cable of the screen is fragile. Bend the cable along the horizontal direction of the screen, not the vertical direction of the screen. 2. Ink screen is more fragile, pay attention to avoid falling, collision, hard press. 3. Note that the screen cannot be powered on for a long time. When the screen is not refreshed, the screen should be set to sleep mode or power off. Otherwise, if the screen stays at a high voltage for a long time, the diaphragm will be damaged and cannot be repaired. 4. When using the ink screen, it is recommended that the refresh time interval is at least 180s, and at least every 24 hours to do a refresh, if the ink screen is not used for a long time, the it should be white storage.