Description: This is an E-Ink display module, 4.2inch, 400x300 resolution, with embedded controller, communicating via SPI interface. Due to the advantages like ultra low power consumption, wide viewing angle, great effect under sunlight, it is an ideal choice for applications such as shelf label, industrial instrument, and so on. Features: No backlight, keeps displaying last content for a long time even when power down. Ultra low power consumption, basically power is only required for refreshing. SPI interface, for connecting with controller boards like for Raspberry Pi/Arduino/Nucleo, etc. Comes with development resources and manual (examples for Raspberry Pi/Arduino/STM32). Specifications: Operating voltage: 3.3V Interface: 3-wire SPI, 4-wire SPI Outline dimension: 90.1mm * 77.0mm * 1.18mm Display size: 84.8mm * 63.6mm Dot pitch: 0.212 * 0.212 Resolution: 400 * 300 Display color: black, white Grey level: 2 Refresh power: 26.4mW (typ.) Standby power: <0.017mW Viewing angle: >170° Package weight: about 66g SYMBOL DESCRIPTION VCC 3.3V GND Ground DIN SPI MOSI pin CLK SPI SCK pin CS SPI chip selection, low active DC Data/Command selection (high for data, low for command) RST External reset, low active BUSY Busy status output, low active Package List: 1 * 4.2inch e-Paper Module (B) 1 * PH2.0 20cm 8Pin Connector Cable Note: If you want more tutorials and instructions about this product, please contact us, we will send related information to you. 1、No backlight, keeps displaying last content for a long time even when power down. 2、Ultra low power consumption, basically power is only required for refreshing. 3、SPI interface, for connecting with controller boards like for Raspberry Pi/Arduino/Nucleo, etc. 4、Comes with development resources and manual (examples for Raspberry Pi/Arduino/STM32).