This is an E-Ink display module, 2.9inch, 296×128 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 an ideal choice for applications such as shelf label, industrial instrument, and so on.
Note: The raw panel require a driver board, If you are the first time use this e-Paper, we recommend you to buy the HAT version or buy more one driver hat for easy use, otherwise you need to make the driver board yourself. And this instruction is based on the version with PCB or driver board.
Features

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

SPI interface, for connecting with controller boards like Raspberry Pi/Arduino/Nucleo, etc.

Comes with development resources and manual (examples for Raspberry Pi/Arduino/STM32)

ResourcesWiki : www.waveshare.com/wiki/2.9inch_e-Paper_Module
Dimensions

Interface

Waveshare 2.9inch e-paper