No backlight required, the last screen display can be for a long time after power failure The power consumption is very low, basically only consuming power when refreshing Based on FOR 40PIN GPIO interface design, suitable for series motherboards and Nano Reserved SPI control interface, can be connected to for / Nano / for / STM32 and other main control boards Onboard level conversion chip, compatible with 3.3V and 5V microcontroller interfaces Specifications Working voltage:Module version: 3.3V/5V,Bare screen version: 3.3V Communication interface:3-wire SPI,4-wire SPI Display color:Red, yellow, black, white grayscale:2 Overall dimensions (mm):Bare screen size: 224.00 x 157.00 x 1.00,Module size: 65.00 x 30.50 global refresh:27s display size:215.52 x 143.68 (mm) point distance:0.2245 x 0.2245 (mm) resolution:960 x 640 pixels Refresh power consumption:Less than 100mW Sleep current:Less than 0.01uA (close to 0) Viewing angle: 170?? The product appearance and printed words depending on the batch, but this does not affect use Color: As Shown Material: LCD B Specifications: With cable Package Contents: 1 x 10.2inch e-Paper 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.