waveshare 4.2inch E Paper Display Module 400x300 Resolution 3.3V 5V Two Color Ink Hat epaper Screen for Raspberry Pi/Arduino/Nucleo Support Full Refresh,SPI Interface

SPI interface, for connecting with controller boards like Raspberry Pi/Arduino/Nucleo, etc. Comes with development resources and manual (examples for Raspberry Pi/Jetson Nano/Arduino/STM32) Onboard voltage translator, compatible with 3.3V/5V MCUs Ultra low power consumption, basically power is only required for refreshing No backlight, keeps displaying last content for a long time even when power down