1.54 inch epaper module, no backlight, keeps displaying the last content for a long time even when power off ^^ For Rasperry Pi e-paper module, ultra low power consumption, basically power is only required for refreshing ^^ For Jetson Nano epaper screen, SPI interface, for connecting with controller boards like Raspberry Pi/Arduino/Nucleo, etc ^^ For Arduino e-paper display, onboard voltage translator, compatible with 3.3V /5V MCUs ^^ Development resources and manual, please contact us for technical support