“These are useless for their intended purpose, but can come in really handy with a little bit of creative thinking.”
I don’t have much faith in the idea that a personal alarm is going to bring people rushing to my aid, or do anything to deter an attacker. Simply putting a hand over the speaker is enough to effectively silence the alarm.
However, I cut the key chains off and replace them with a little string, thread, or fishing line and use them for alarming doors and windows when I am traveling. More expensive versions come with special switches for these applications, but I have never failed to find a way to tie one of these off to a door or a window.

