Apple AirTag review: The tag's next-gen tech will detect precise proximity when locating an object SECTIONS Apple AirTag review: The tag's next-gen tech will detect precise proximity when locating an objectBy Share Reuters When an AirTag is lost and outside the range of your phone, you can put it in lost mode and allow other Apple phones to find the AirTag to help you see where the item was last spotted on a map. Related But inside, the story gets far more interesting. The AirTag, which Apple introduced last week, is one of the first consumer electronics to support a new wireless technology, ultrawideband, which lets you detect precise proximity between objects. Using ultrawideband, your iPhone can sense whether an AirTag is an inch or dozens of feet away from it. It’s so accurate that its app will even show an arrow pointing you in the direction of the AirTag.