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Numerous infectious diseases are repeated periodically in the world. And people know that washing hands for more than 30 seconds is an effective way to prevent disease. But the problem is that there are many people who don't wash their hands for more than 30 seconds.
This soap dispenser gives feedback on how long did a person washed their hands. After receiving feedback on how long a person should be washing their hands, people are motivated to wash their hands for at least 30 seconds.
Chungju-si, South Korea