This is an E-Ink (E-Paper) display module, similar to those used in E-book readers. The Size is 1.54inch covering a 200x200 resolution, with embedded controller, communicating via SPI interface. It supports partial refresh.
Due to the advantages like ultra low power consumption, wide viewing angle, clear display without electricity and high visibility under bright sunlight, it is an ideal choice for applications such as shelf label, industrial instrument, and so on.
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)