No backlight is required, and the last screen display content can be maintained for a long time when the power is turned off The power consumption is very low, and power is consumed only during screen refresh The electronic ink screen provides clear picture visibility under ambient light without backlight, offering a display effect similar to traditional paper Suitable for applications such as shopping mall price tags, asset equipment tags, electronic shelf tags, and conference name tags Communication interface: SPI Display colors: red, yellow, black, white Operating voltage: 3.3V Supports 3-wire SPI and 4-wire SPI interfaces Grayscale level: 2 Full refresh time: 21 seconds Refresh power consumption: Less than 30mW (typical) Dot pitch: 0.1755 x 0.1755mm Resolution: 792 x 272 pixels Viewing angle: 170° Material: PVC Color: As shown in image Note: Due to different production batches, printed text on the product may vary slightly but does not affect functionality Package includes: 1 x E-ink Screen (without module) Content limited to the above; other items not included Note: Lighting and display differences may cause slight color variations between the image and actual item. Measurement error allowed: +/- 1-3cm