Apple’s all-new product category, AirTag, is with us in a matter of days. It’s a small, cute wireless tracker that’s been designed to help you find, well, any of your stuff. It’s small enough to pop into the smallest pocket in your backpack, attach (with the right optional extra) to your keys, luggage and more.

Here’s how it works, and everything you need to know.

Tiny and light Each AirTag is round, measuring 1.26 inches (31.9mm) in diameter and weighing 0.39 ounces, 11g. Flat on one side, glossy white and domed on the other, like a tempting peppermint.

Bluetooth, U1, NFC These are the technologies built in to each AirTag. They are powered by a CR2032 battery which, Apple says, lasts a year and is user-replaceable.

How does it work? Well, Bluetooth is only a short-range signal, so it’s only used when the AirTag is nearby. But the clever thing is, it only needs to be near to any Apple device, not yours. So, if you’ve put the AirTag into Lost Mode, it pings out a silent signal and when.

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