The present invention relates to a digital wristband using Bluetooth beacon technology with low battery consumption. It was intended to prevent missing children by ringing. The purpose is to prevent the child from getting lost and separated from the family when the parent and child go out together. The effect can only be obtained by holding it in the hand, so it can be solved by wearing a bracelet to the user. When worn on a child''s wrist, it acts as a fashion bracelet and at the same time, it is linked to the parent''s smartphone app through Bluetooth Beacon technology to measure the location in real time. According to the distance value set in the parent''s smartphone app, if the child moves further than that value, an alarm is sounded to prevent separation from the family. Parents feel a sense of security around their children even when they are not looking at them with their own eyes, so there is an effect of reducing fatigue.
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