The Treasure Tag will pair with a Lumia device either via Bluetooth or NFC. The device actually works both ways. For example after pairing with your smartphone and you were to leave your house without your phone, when you are out of range, the Treasure Tag or your phone will emit an alert that will remind you that you have forgotten your device. Also thanks to the accompanying Windows Phone app, you will also be able to locate lost/misplaced items using Nokia HERE technology. This isn’t the first time we’ve seen Bluetooth trackers and chances are it won’t be the last, but if you’re looking for an accessory that’s specifically geared for your Nokia Lumia device, the Treasure Tag will be it, although third-party apps for iOS and Android devices will be released later on as well.