1.No backlight, keeps displaying last content compatible with a long time even when power down. 2.Ultra low power consumption, basically power is only required compatible with refreshing. 3.SPI interface, compatible with connecting with controller boards like compatible with Raspberry Pi/Arduino/Nucleo, etc. 4.Onboard voltage lator, compatible with 3.3V/5V MCUs . Specifications : Operating voltage: 3.3V~5V Interface: 3-wire SPI, 4-wire SPI Dot pitch: 0.212 x 0.212 Resolution: 400 x 300 Grey level: 2 Full refresh time: 4s Refresh power: 26.4mW(typ.) Standby power: less than 0.017mW Viewing angle: more than the170 degree Colour:Blue white Material:PCB Size:103 x 78mm Package Contents: 1 * 14.2 Inch E-Ink Display Module 1 * wire Only the above package content, other products are not included. Note: Light shooting 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.