400x300, 4.2inch E-Ink display module(B), red/black/white three-color, SPI interface

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 Raspberry Pi/Arduino/Nucleo, etc.
→ Onboard voltage translator, compatible with 3.3V/5V MCUs
→ Comes with development resources and manual (examples for Raspberry Pi/Jetson Nano/Arduino/STM32)

Technical Specs

→ Operating voltage: 3.3V~5V
→ Interface: 3-wire SPI, 4-wire SPI
→ Outline dimension: 103.0mm × 78.5mm
→ Display size: 84.8mm × 63.6mm
→ Dot pitch: 0.212 × 0.212
→ Resolution: 400 × 300
→ Display color: yellow, black, white
→ Grey level: 2
→ Full refresh time: 15s
→ Refresh power: 26.4mW(typ.)
→ Standby power: <0.017mW
→ Viewing angle: >170°

Resources

www.waveshare.com/wiki/4.2inch_e-Paper_Module_(B)