This is a color 4.2 inch e-paper display with 400x300 resolution, 24 pins FPC connection, optional FPC connector, communicating via SPI interface, with embedded controller(COG package) and on-chip stored waveform, supports black, white and red. It's IC is UC8276. The I2C signal master interface to read built-in temperature sensor.
In view of so many advantages: ultra low power consumption, near 180 degree view angle, readable under sunlight, GDEH042Z21 is a very good choice for applications like shelf label, smart tags, smart home application, industrial instrument, smart cards and other related products.