Miscellaneous Electronics
7.5inch E-Paper Display HAT Module 800×480 E-Ink Electronic Paper Screen Three Color White/Black/Red for Raspberry Pi/STM32/Jetson Nano with e-Paper ESP8266 Driver Board (WiFi)
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 Come with e-Paper ESP8266 Driver Board (WiFi) allows to display image from PC/smart phone...
https://www.bizrate.co.uk/miscellaneouselectronics/7-5inch-e-paper-display-hat-module-oid34184636859.html