Well, well, well...someone beat me to it.
ADD Consults Store : Now You Can Find It: Find Your Stuff!
Isn't technology grand?
It has a 30 foot range.
You only get 4 locator tags...1 each for eyeglasses, keys, SO, and yourself.
I just got done searching the entire house, garage and vehicles for dh2b's eyeglasses.
I did find some other things I had been looking for, so it was not wasted time.