Apple’s new AirTags , $30 wireless devices that help you locate things, work well. Frighteningly well. Clip a button-sized AirTag onto your keys, and it’ll help you find where you accidentally dropped them in the park. But if someone else slips an AirTag into your bag or car without your knowledge, it could also be used to covertly track everywhere you go.
Source: Review | Apple’s AirTag trackers made it frighteningly easy to ‘stalk’ me in a test