Apple Airtag

AirTag is a super-easy way to keep track of your stuff. Attach one to your keys, slip another in your backpack. And just like that, they’re on your radar in the Find My app, where you can also track down your Apple devices and keep up with friends and family.

Your AirTag sends out a secure Bluetooth signal that can be detected by nearby devices in the Find My network. These devices send the location of your AirTag to iCloud,then you can go to the Find My app and see it on a map. The whole process is anonymous and encrypted to protect your privacy. And it's efficient, so there's no need to worry about battery life or data usage.