The SPI communication interface is reserved for easy access to /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 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 , suitable for 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: 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.