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 basically only consumes power when refreshing The electronic ink screen can display the picture clearly under ambient light such as light and , without backlight, and is comparable to the display effect of traditional paper. It is often used in applications such as Applicable to shopping mall price tags, asset equipment tags, electronic shelf tags, conference name tags, etc Communication interface SPI Display color: red, yellow, black, white Operating voltage: 3.3V Communication interface: 3-wire SPI, 4-wire SPI Grayscale level: 2 Global refresh: 21s Refresh power consumption: Less than 30mW (typ.) Dot pitch: 0.1755x 0.1755mm Resolution: 792x 272pixels Viewing angle: 170° Material: PVC Color: As Shown (Due to different batches, the printed words on the product be different, which does not affect use) Package Contents: 1 x E-ink Screen (without module) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.