The power consumption is very low, and basically only consumes power when refreshing No backlight is required, and the last screen display content can be for a long time when the power is turned off Size: 3.97 inches Operating voltage: 3.3V Point spacing: 0.108mmx0.108mm Resolution: 800x480 Display Color: black, white Grayscale: 4 Viewing angle: 170 Communication interface: 3-wire SPI, 4-wire SPI Global refresh: 3.5S Quick refresh: 2.8S Local refresh: 0.6S Four grayscale refresh: 3.5S Refresh power consumption: Less than 40mW Sleep current: Less than 0.01uA (close to 0) ( screen) Color: As Shown Material: PCB Package Contents: 1 * E-Ink Display 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.