LifeBand / bracelet to call lifeguard

It is not easy for a coast guard to detect every accident with naked eyes in a crowded beach. LifeBand is a bracelet with a call button for a coast guard. With an RFID chip, it enables immediate location of the place where an accident happens. If the situation is so that the person is unable to push the button, the bracelet automatically sends out a signal to the coast guard when the heart beat check turns out faster than a certain level. LifeBand is created of photo-chromatic material, which turns darker under stronger ultraviolet rays, so that it may tell you when you are more likely to get a sunburn.