No backlight is required, and the last screen display content can be for a long time when the power is turned off. The power consumption is very low, and basically only consumes power when refreshing. Based on the for 40PIN GPIO interface design, it is suitable for and other series motherboards. Adopting the for HAT+ standard, it improves the interoperability of the expansion board, helps developers design and develop faster, and more easily use external devices and expand the functions and performance of the for . Reserve the SPI communication interface for easy access to the main control board such as for / ESP32 / STM32 / series. Onboard level conversion chip, compatible with 3.3V and 5V level interfaces. Working voltage: Module version: 3.3V/5V Display colors: red, yellow, black, white Communication interface: 3-wire SPI, 4-wire SPI Grayscale level: 2 Global refresh: 21 seconds Display size: 259.76x91.68 (mm) Dot pitch: 0.191 x 0.191 (mm) Resolution: 1360 x 480 pixels Refresh power consumption:Less than 70 mW Sleep current:Less than 0.01uA (close to 0) Viewing angle: 170° Due to different batches, there may be differences in product appearance and printed text, which not affect use. Colour:As Shown Material:PCB+LCD Package Contents: 1 * E-Paper Screen 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.