This is an E-Ink display module, 1.54 inches, 200x200 resolution, with embedded controller, communication via SPI interface, support for partial refresh.
Due to its ultra-low power consumption, wide viewing angle, and good sunlight, it is ideal for applications such as shelf labels and industrial instruments.
No backlight, it can display the last content for a long time even when it is turned off
Ultra-low power consumption, basically just refresh the power supply
SPI interface for connecting to Raspberry Pi / Arduino / Nucleo and other control boards.
With development resources and manuals (examples of Raspberry Pi / Arduino / STM32)