1、Working Principle: The electronic ink screen uses the "microcapsule electrophoresis display" technology to display images. Its working principle is that the charged nanoparticles suspended in the liquid are migrated by the action of the electric field. The display effect of the paper. 2、No Need for Backlight: The E Ink display module does not need a backlight, and it can keep the display content of the last screen for a long time when the power is turned off. 3、SPI Control Interface: The E Ink display module can be connected to for Raspberry Pi, for Jetson nano, for STM32 and other main control boards, with low power consumption. 4、Clear Picture: The E Ink display module can clearly display the picture under ambient light such as lighting and natural light without backlight, and the viewing angle can up to almost 180°. 5、Applicable: On board level conversion chip, compatible with 3V and 5V level interface. Because of its display effect comparable to traditional paper, it is often used in applications such as readers. 1 x E Ink Display Module1 x Cable1 x Screw Bag Tem Type: E Ink Display ModuleMaterial: E Ink, PCBScreen Display Size: Approx. 29.568 x 29.568mm/ 1.2 x 1.2inDot Pitch: Approx. Approx. 0.176x 0.176mm/ 0.01 x 0.01inWorking Voltage: 3.3VCommunication Interface: 3 Wire SPI, 4 Wire SPIResolution: 168x168Display Color: Red, Yellow, Black, WhiteGrayscale: 2Global Refresh: 12sRefresh Power Consumption: < 57mW(typ.)Viewing Angle: 170 Degree-180 DegreeVCC: 3.5V 5VGND: GNDDIN: SPI Communication MOSIi PinSclk: SPI Communication SCK PinCS: SPI Chip Select Pin (Active Low)DC: Data Command Control Pin (High Level Means Data, Low Level Means Command)RST: External Reset Pin (Low Level Reset)BUSY: Busy Status Output Pin