TrackR wallet 2.0 is a credit card sized Bluetooth tracking device that fits perfectly in your wallet. You can use the free TrackR app to locate your wallet in seconds, and you can use your TrackR device to ring your phone, even on silent mode! If your wallet is lost outside of Bluetooth range, TrackR’s Crowd GPS network can help you recover it. When a TrackR user is within range of your lost item, you’ll receive a location update to your smartphone.