SPI interface, for connecting with other controller boards like Raspberry/Arduino/Nucleo, etc. Onboard voltage translator, compatible with 3.3V/5V MCUs. Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards, Jetson Nano. Onboard 4x Keys. 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. This is an E-Ink display HAT for Raspberry Pi, 2.7inch, 264x176 resolution, with embedded controller, communicating via SPI interface. Due to the advantages like ultra low power consumption, wide viewing angle, clear display without electricity, it is an ideal choice for applications such as shelf label, industrial instrument, and so on. Provide online user manual (examples for Raspberry Pi/Jetson Nano/Arduino/STM32), please check the manual carefully before using!.