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 Onboard level conversion chip, compatible with 3.3V and 5V microcontroller interfaces Based on for the 40PIN GPIO interface design, suitable for series motherboards, for Nano, RDK X3 SPI control interface, can be connected to for /for Nano/for RDK X3/for / STM32 and other main control boards Size: 3.97 inches Operating voltage: 3.3V/5V 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) (Module version) Color: As Shown Material: PCB Package Contents: 1 * E-Ink Display HAT+ 1 * Screw Pack 1 * Connecting Cable 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.