A passerby with an iPhone won't be alerted of the AirTag, but the AirTag can send you a notification if it accesses the Find My network while in Lost Mode.

Even as Apple attempts to thwart criminals using the tracking device, news organizations, police, and other entities have taken to using AirTag in their profession. If an AirTag has been separated from its owner for an undesignated period of time, it will begin chirping regularly.

Users can also place AirTag into Lost Mode and be notified when it is in range or has been located by the vast Find My network. Instead of just putting them on a holder hanging from your luggage, you can customize them to make them as unique as possible with some great accessories. Splash, water and dust resistance are not permanent conditions and resistance might decrease as a result of normal wear.

PrecisionFinding is compatible with iPhone11, iPhone11Pro, iPhone11ProMax, iPhone12, iPhone12mini, iPhone12Pro, iPhone12ProMax, iPhone13, iPhone13mini, iPhone13Pro, iPhone13ProMax, iPhone14, iPhone14Plus, iPhone14Pro, and iPhone14ProMax. Users will need to be within Bluetooth range, so about 15 to 30 feet away, to use Precision Tracking.If the iPhone detects a device using the Find My network following the person around, perhaps in a backpack or vehicle, the iPhone will alert the user of the AirTag. After a while, if you still haven’t found it, the AirTag will start playing a sound to let you know it’s there. If someone else’s AirTag finds its way into your stuff, your iPhone will notice it’s travelling with you and send you an alert.