Apple Digital Tracker for Objects
The Apple AirTag is intended to find lost objects. In the promotional images, the manufacturer emphasizes its use in suitcases, backpacks and key chains. It has three connection types, the Bluetooth, the UWB and the NFC. Each of them performs specific functions, such as accurate search, location by proximity and Lost Mode, a tool already used by other Apple devices.
See the product description here: https://www.apple.com/br/airtag/