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~5VInterface: 3-wire SPI, 4-wire SPIDot pitch: 0.212 x 0.212Resolution: 400 x 300Grey level: 2Full refresh time: 4sRefresh power: 26.4mW(typ.)Standby power: less than 0.017mWViewing angle: more than the170 degreeColour:Blue whiteMaterial:PCB Size:103 x 78mmPackage Contents:1 * 14.2 Inch E-Ink Display Module1 * wireOnly the above package content, other products are not included.Note: Light 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.