Well, mine is a real PLB. and only has one button. no options.

So bear that in mind...

Now the flip side of it is that my wife *is* aware I have it with me. so she probably does know that I'm either 1) dead, or 2) really delayed but not seriously hurt. (since I've pretty much told her that's the situation if I'm really overdue and the button hasn't been pressed....) She will tell anyone she calls that I *do* have the PLB with me.