Item Type: E Ink Display ModuleMaterial: Electronic Ink, PCBSize: Approx. 88.5x 41mm / 3.48x1.61inScreen Size: Approx. 70x29mm / 2.76x1.14inOperating Voltage: 3.3V 5VCommunication Interface: 3 Wire SPI, 4 Wire SPIDot Pitch: 0.176x 0.176mm/0.01 x 0.01inResolution: 400 x 168Display Color: Red, Yellow, Black, WhiteGrayscale Level: 2Global Refresh : 16SRefresh Power Consumption: 170VCC: 3.5V 5VGND: GNDDIN: SPI Communication MOSI PinSCLK: SPI Communication SCK PinCS: SPI Chip Select Pin (Active Low)DC: DataCommand Control Pin (High Level Indicates Data, Low Level Indicates Command)RST: External Reset Pin (Reset Low)BUSY: Busy Status Output PinPackage List1 x E Ink Display Module1 x Connection Cable1 x Screw PackagePlease allow for some errors in manual measurements.1Working Principle: E ink display module uses "microencapsulated electrophoretic display" technology to display images. It works on the principle that charged nanoparticles suspended in a liquid migrate under the action of an electric field. The display effect of paper. 2No Backlight Required: E paper screen display module does not require a backlight and can maintain the display content of the previous screen for a long time when the power is turned off. 3Widely Compatible: E paper screen display module can be connected to for Raspberry Pi, for Jetson nano, for STM32 and other main control boards with low power consumption. 4Clear Image: E paper electronic screen panel can display the picture clearly in ambient light such as illumination and natural light with a viewing angle of nearly 180 degree. 5Superior Performance: The E ink display module has an on board level conversion chip and is compatible with 3.3V and 5V level interfaces. It is often used in applications such as readers because its display is comparable to traditional paper.