TrackR: crowdfunded wafer with low-power Bluetooth helps you find misplaced wallet, etc.

The $19 TrackR is a like a leash between your wallet and your mobile phone. It's a Bluetooth-enabled wafer of plastic that fits in your wallet or pocket. You pair it with your phone, and whenever the TrackR and your phone get separated both your phone and the TrackR start beeping.

The app also takes a GPS snapshot of where your wallet was at the moment of separation in case you didn't hear the alert. Tap a button within the app to make your wallet "ring" in case your looking for it around the house or in the dark. The technology works both ways, which means your wallet can beep to alert you that you're leaving your phone behind. Works with your iPhone 4S, iPhone 5, new iPad, iPad mini and the new iPod Touch.

Yesterday, I met with Scott Hawthorne (left) and Chris Herbert (right) of Phone Halo, the 5-person company that designed the TrackR. They demoed the TrackR and I was impressed with how well it works. At $19, it seems like a good deal. They said the battery life is 1.5 years.

Scott and Chris kindly left a sample unit with me, which I plan to start using. I'll review it after I've had it for a week or two.

The TrackR will be available in the US and internationally as soon as the FCC and CE approve it (it uses low-power Bluetooth). You can pre-order one on Indiegogo for an estimated April delivery.