Ultra low power consumption, basically power is only required for refreshingPreserved solder pads for SPI interface, compatible with other controller boards like for Arduino/Nucleo, etc.Onboard voltage translator, compatible with 3.3V/5V MCUs,Comes with development resources and manual (examples compatible for Raspberry Pi/Arduino/STM32)No backlight, keeps displaying last content for a long time even when power downOperating voltage: 3.3V/5VInterface: SPIDot pitch: 0.194 x 0.194Resolution: 250 x 122Display color: black, whiteGrey level: 2Partial refresh time: 0.3sFull refresh time: 2sRefresh power: 26.4mW(typ.)Standby power: Less than 0.017mWViewing angle: Greater than 170 degreeColour:Photo ColorMaterial:Plastic + MetalSize:Outline dimension: 65mm x 30.2mmDisplay size: 23.71mm x 48.55mmPackage Contents:1 x 2.13inch e-Paper HAT1 x RPi screws pack (2pcs)1 x PH2.0 20cm 8PinNote: 100% from WaveshareOnly 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.