Why does Xiaomi Temperature and Humidity Monitor Clock use E-ink screen? What are the advantages?

The Xiaomi Temperature and Humidity Monitor Clock utilizes an E-ink screen primarily for its energy efficiency and readability. E-ink displays consume minimal power, allowing the device to operate for extended periods without frequent recharging or battery replacement. Additionally, E-ink screens offer high visibility and readability, even in bright sunlight, making it easy for users to view temperature and humidity readings at a glance. This ensures that the device remains functional and easy to use in various lighting conditions, providing users with accurate and convenient monitoring of environmental conditions.
Note: 
The 3.7'' (88mm x 33mm) e-ink display boasts ultra-low power consumption, offering a battery life of approximately one year with only two button cell batteries. Its display closely resembles printed text, ensuring easy and clear visibility from various angles.