This is 2.13inch E-Ink display HAT for ,250x122 resolution, with embedded controller, communicating via SPI interface, supports partial refresh. Due to the advantages like ultra low power consumption, wide viewing angle, clear display without electricity, it is a perfect choice for applications such as shelf label, industrial instrument, and so on. No backlight, keeps displaying last content for a long time even when power down Ultra low power consumption, basically power is only required for refreshing Standard 40PIN GPIO extension header, supports series boards, Nano. Preserved solder pads for SPI interface, for connecting with other controller boards like /Nucleo, etc.Onboard voltage translator, compatible with 3.3V/5V MCUs Operating voltage: 3.3V/5V. Interface: SPI. Outline dimension: 65mm x 30.2mm. Display size: 23.71mm x 48.55mm. Dot pitch: 0.194 x 0.194. Resolution: 250 x 122. Display color: black, white. Grey level: 2. Partial refresh time: 0.3s. Full refresh time: 2s. Refresh power: 26.4mW(typ.). Standby power: 170. color:Blue Material:PCB Package Contents: 2 x 2.13inch e-Paper HAT 2 x RPi screws pack 2 x 20cm 8Pin Cable 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.