Apple seems to have perfected its Bluetooth tracker on its first try.
How to find out if an AirTag is tracking you
Apple AirTag Review: The Best Tracker For iPhone Users
Locate an AirTag or other item in Find My on iPhone - Apple Support
Apple's AirTag trackers made it frighteningly easy to 'stalk' me
AirTag. Keep track of your keys, wallet, luggage, backpack, and more, all in the Find My app. Play a sound on the built-in speaker, or say Hey Siri, find my gym bag. With select iPhone models, Precision Finding can lead you right to your nearby AirTag.1 If it's further away, hundreds of millions of Apple devices in the Find My network can help track it down. All anonymously and encrypted for privacy.
Apple AirTag - 1 pack
Apple AirTags: Everything You Need to Know - CNET
5 ways to use Apple AirTags like the pros
How to find your iPhone with these three Bluetooth trackers - Gearbrain
Apple AirTag review: I once was lost, but now am found
Apple AirTags are $29 and here to help find your lost keys and phone - CNET