Apple AirTag is a quarter-sized Bluetooth tracker designed to help you keep tabs on valuables or frequently lost items like your car keys, wallet, or luggage. It can be used for tracking essentially anything you can attach it to, and it can be put into Lost Mode, which will notify you when its detected by a device in the network. AirTag emits a Bluetooth signal that anonymously connects to any nearby device active within Apple’s Find My network. The AirTag’s location is triangulated based on the strength of the Bluetooth signal sent to those third-party devices. AirTag is designed to discourage unwanted tracking, and if someone elses AirTag finds its way into your stuff, your iPhone will notice its traveling with you and notify you. AirTag can also be used to track luggage, and it is water-resistant. However, there have been reports of AirTags being used for nefarious purposes, such as stalking and theft. Apple has taken steps to address these issues, such as changing the way AirTags work and working with law enforcement to support their investigations.