Apple AirTag is a small tracking device that works by emitting a secure Bluetooth signal detected by nearby Apple devices within the Find My network. These devices then anonymously relay the AirTag's location to the cloud, allowing the owner to see the AirTag's position on a map in the Find My app. For more precise locating, iPhones with a U1 ultra-wideband chip (iPhone 11 and later) can use Precision Finding, which provides direction and distance to the AirTag. The AirTag can also be made to play a sound to help find it nearby. To prevent unwanted tracking, AirTags have built-in safety features like alerting users if an unknown AirTag is traveling with them and emitting a sound after being separated from its owner for a period. Users can also mark an AirTag as lost, providing contact info accessible via NFC for anyone who finds the AirTag.