The SPI communication interface is reserved for easy access to Arduino/STM32 and other main control boards; the onboard level conversion chip is compatible with 3.3V and 5V level interfaces No backlight required, the last screen display can be kept for a long time when the power is off The power consumption is very low, basically only consumes power when refreshing Onboard 40PIN GPIO interface is similar in size to Raspberry Pi, suitable for Raspberry Pi 5/4B/3B/3B+ motherboards Suitable for mall price tags, asset equipment tags, electronic shelf labels, conference name tags, etc Working voltage: 3.3V/5V Display colors: red, black, white Grayscale: 2 Global refresh: 16s Communication interface 3-wire SPl, 4-wire SPI Resolution: 360 x 240pixels Viewing angle: Greater than 170° Colour:As Shown Material:PCB+electronic components Package Contents: 1 x E-ink Screen Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.