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 HATand standard, it improves the interoperability of the expansion board, helps developers design and develop faster, and more easily use various 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 or ESP32 or STM32 or series. Onboard level conversion chip, compatible with 3.3V and 5V level interfaces. Working voltage: Module version: 3.3V or 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:PCBandLCD Package Contents: 1 x 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.