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

Specifications:

DISPLAY COLOR	Yellow

OPERATING VOLTAGE	3.3V/5V
INTERFACE	3-wire SPI, 4-wire SPI
OUTLINE DIMENSIONS	89.5 × 38mm
DISPLAY SIZE	66.90 × 29.06mm
DOT PITCH	0.227 × 0.226mm
RESOLUTION	296×128 pixels

GREY SCALE	2
FULL REFRESH TIME	15s
REFRESH POWER	30mW(typ.)
STANDBY CURRENT	<0.01uA (almost none)
VIEWING ANGLE	>170°

Applications

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Overview

Can you imagine a screen powered without a battery or a cable? With the help of E-Paper technology, you can make it happen!

You can use a controller with SPI - NodeMCU ESP8266, ESP32, Arduino, Raspberry Pi etc to display the screen content. Then the screen will retain the image for weeks without power until you refresh it again.

What is an E-Paper?

E-Paper, sometimes called E-Ink is a technology that replicates the look of ordinary ink on paper. Normally, traditional displays use backlighting to illuminate pixels and display an image whereas in E-Paper displays, there is an electrically charged surface and the movement of electrically charged molecules in an electric field helps to display an image on the screen. When the user looks at the E-Paper screen, the light from the environment gets reflected from the surface of the E-Paper and reaches the eyes.

Advantages Over Traditional Displays

E-Paper screens are bi-stable, which means unlike traditional displays that refresh at about 60 times per second and require a power source to retain the content, an E-Paper will retain a static image for weeks without electricity and needs power only when the content on the screen needs to be changed. Also, they offer paper-like readability where they can heavily reduce the strain on the eyes while being able to use outdoors under bright sunlight. E-Papers have wide viewing angles and have high-resolution displays with no-glare.