https://techcrunch.com/2021/04/20/apple-officially-unveils-its-lost-item-finder-airtag/

Apple today officially unveiled AirTag, its location tracking beacons that can help Apple device owners find lost items through Apple’s “Find My” application. The AirTags themselves are small, rounded tracking devices that can be attached to personal items, like purses, bags or keys. Pre-orders start April 23rd and are $29 USD for one AirTag or $99 for a pack of four.

The tags are small, polished stainless steel and white, and circular in shape, and have the Apple logo printed on the front. They also come with a various case options and keychain dongles, allowing you to add an AirTag to your keys, for example, or a handbag or duffle, and so on. Further customization exists, including emoji symbols.