It never fails. I'm rushing out the door late to work and I can't find my keys or my wallet—and sometimes my smartphone. Attach a Trackr Bravo tag to your keys or bag, pair the tag with your smartphone and, when you lose track of an item, you can find them it with the TrackR app. The alerting works both ways; you use the app to find items with the tag attached and the tag can be set to automatically alert you with a 85dB alarm if you get separated from your phone. This is great if you are in the bad habit of leaving your phone at public places or even in your car by accident. And if you don't want to get separation alerts in specific places, like your home, you can set up Safe Zones.