If you spend any time at all driving or walking through unsafe neighborhoods, or if you are alone most of the time, you need to know which personal security devices are most likely to protect you. These devices vary from safe, non-lethal alarm-type systems to lethal self-defense devices such as firearms. You can determine which devices are good for your use.
In all likelihood, every home and every business would benefit from the security of a panic alarm. Breaks-in are common enough, but with people living longer the probability of stroke or heart attack have risen too. If you were living alone it would be awful to be lying on the ground incapacitated for hours. Panic alarms are the answer. They can be sited in a handy location or worn around your neck.