http://sfglobe.com/2015/12/17/coin-sized-device-sounds-alarm-and-notifies-family-in-threatening-situations/?src=srd_47892&t=syn I actually think this is a great idea, especially for our children. I'm never going to rule a handgun out though, or self-defense. I will never outweigh a man, but I can still protect myself in many situations.