Cobra PhoneTag It's a traveler's nightmare. You're late for your flight (or meeting) and can't find your keys. Cobra's key ring attachment lets you "call" your keys from your phone. Or, if you walk too far from your keys accidentally, it will immediately send a text or email to your phone alerting you that you've left them behind, with GPS coordinates telling you where they are. Consider it a $80 insurance payment for that time you somehow leave them in the freezer the night before.