reporter: technology to the rescue. well, maybe. thanks to these babies, we don t have to remember where we left stuff. reporter: in our how to tech series, david pogue, vice president of yahoo! tech looked at six of the new tracking devices that pair with your phone and use an app to track your lost things. generally household items but meow. did you really put one of these on your cat? no. if not for finding felines what are they for? these are tiny coin-sized bluetooth trackers. you stick them on your keys or luggage or your purse or coat or something that you misplace a lot. the devices chirp to alert you to their location. david has instructed our production team to hide my purse, my keys and my wallet around the house, all with trackers attached. okay. i m going to fire up the tile app. i hear them. aha. bingo. most of them go for six months to a year without