1.No backlight, keeps displaying last content for a long time even when power down. 2.Ultra low power consumption, basically power is only required for refreshing. 3.SPI interface, for connecting with controller boards like for //Nucleo, etc. 4.Onboard voltage translator, 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: 2 x 14.2 Inch E-Ink Display Module 2 x wire 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.