Low Cost Device to Keep People Safe Distance from Covid19

According to WHO saying it is more difficult to maintain physical distance of 1 metre (3 feet). We make words into action. We R&D the smart bracelet to solve this difficulty. When the distance is less than 1 meter between two people, 

our bracelet will shake and warn people. This will be helpful to everyone, specially in pubilc place, or the kids in school. 

https://www.who.int/emergencies/diseases/novel-coronavirus-2019/advice-for-public