Brilliant idea building this into a keychain, thank god people never misplace and/or lose those things!![]()
I bet that you can also move your iPhone around to locate the missing key fob, just as you move your key fob away from your iPhone to trigger the alerts.
Or you could clip the thing to your man purse, sorry, messenger bag, and have that trigger either by your iPhone moving away or your "messenger bag."
Not trying to be snarky, just pointing out the obvious here.