Apple's AirTag is a small, coin-shaped tracking device designed to help users locate personal items like keys, bags, or wallets. It uses Bluetooth technology to connect with Apple's Find My network, allowing users to track their belongings through the Find My app on their iPhone or iPad. The AirTag features a built-in speaker that plays sounds to help locate it and has a user-replaceable battery that lasts about a year. It also includes privacy features to prevent unwanted tracking, ensuring that only the owner can see the location of their AirTag.