Format: BulkAge: Platform: N/AStop losing your keys or leaving your wallet behind with the Nokia WS-10 Treasure Tag Mini Proximity Sensor with Bluetooth 4.0. This sensor is the perfect way to keep those important items close. Simply attach the sensor to your belongings, and you""ll be able to quickly see where your items are using the app. Plus, if you walk out of reach of the sensor, you""ll instantly get a notification on your phone letting you know you""ve left your belongings behind. The tag works with Android, Nokia Lumia, and iOS devices (up to iOS 8), and is simple and easy to attach! Attach using use the included strap, stick it on a key ring, or come up with your own way to attach it to important devices. Now, you""ll never leave important items behind again.