Meet the Safeti: an on-demand personal safety system that gets you in touch with a security professional when you are in trouble. When you click its button rapidly, you get a call from a professional to help you get out of trouble. Your contacts will be able to monitor your location as well. The device works anywhere there is a cell signal and pinpoints your location using multiple geo-location technologies.
Safeti does not require Bluetooth to work. It can prove useful for seniors who live alone and kids who are not with their parents. It is water resistant and has a battery that lasts a year. You can find it on Indiegogo.