1、Design Principle: The electronic paper used in this product adopts the microcapsule electrophoresis display technology for image display, the basic principle of which is that the charged nanoparticles suspended in the liquid are subject to migration by the electric field. 2、Clear Wide Angle Display: E paper display relies on the reflection of ambient light to display patterns, without backlighting, and is clearly visible under ambient light, with a viewing angle of almost 180°. Therefore, it is very suitable for reading. 3、Widely Compatible: Based on for RPi 40 PIN GPIO interface design, suitable for RPi series motherboards, for Jetson Nano, for RDKX3, reserved SPI control interface, can be accessed to for RPi, for Jetson Nano, for RDKX3, for STM32 and other motherboards, on board level conversion chip, compatible with 3.3V and 5V microcontroller interfaces. 4、Refresh Time: The refresh time of this E paper display module is 22s, the refresh time is experimental test data, the actual refresh time will have error, subject to the actual effect. There will be flickering effect during the global refresh process, which is normal. 5、Refresh Power Consumption: E paper screen module power consumption of 75mW, power consumption data for the experimental test data, the actual power consumption due to the existence of the driver board and the actual use of different situations, there will be a certain error, the actual effect shall prevail.