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 3.3V and 5V level interface. Because of its display effect comparable to traditional paper, it is often used in applications such as readers. Tem Type: E Ink Display Module Material: E Ink, PCB Screen Display Size: Approx. 29.568 x 29.568mm/1.2 x 1.2in Dot Pitch: Approx. Approx. 0.176x 0.176mm/0.01 x 0.01in Communication Interface: 3 Wire SPI, 4 Wire SPI Resolution: 168x168 Display Color: Red, Yellow, Black, White Grayscale: 2 Global Refresh: 12s Refresh Power Consumption: < 57mW(typ.) Viewing Angle: 170 Degree-180 Degree VCC: 3.5V 5V GND: GND DIN: SPI Communication MOSIi Pin Sclk: SPI Communication SCK Pin CS: 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 1 x E Ink Display Module 1 x Cable 1 x Screw Bag