Pillar · Apple Find My

The Complete AirTag Guide

AirTag is Apple's coin-sized Bluetooth tracker, located by roughly 2 billion Apple devices on the Find My network — no SIM, no subscription. This is the map to everything we've published: how it works, setup, accuracy, battery, travel rules, anti-stalking safety, and when to pick something else.

Quick answer

An AirTag is an 11-gram disc with Bluetooth, a U1/U2 Ultra-Wideband chip, a speaker, and a replaceable CR2032 battery — but no GPS, Wi-Fi, or cellular. It borrows location from the ~2 billion Apple devices on the Find My network. Pick AirTag for keys, bags, wallets, and luggage in iPhone-dense places. It is NOT a live tracker for a moving car or a dog on open land, and it cannot pair to an Android phone — for those, use a cellular GPS tracker or a Find Hub tag.

In short

What it is, why it works, when to use it

What it is

An AirTag is an 11-gram disc with Bluetooth, a U1/U2 Ultra-Wideband chip, a speaker, and a replaceable CR2032 battery — but no GPS, Wi-Fi, or cellular. It borrows location from the ~2 billion Apple devices on the Find My network.

Why it matters

That scale means a $29 tag with no radio of its own can be found almost anywhere an iPhone walks past, with end-to-end encryption and no monthly fee — provided someone's iPhone passes near it.

When to use it

Pick AirTag for keys, bags, wallets, and luggage in iPhone-dense places. It is NOT a live tracker for a moving car or a dog on open land, and it cannot pair to an Android phone — for those, use a cellular GPS tracker or a Find Hub tag.

01

What it is and how Find My powers it

AirTag has no GPS — when it leaves your own iPhone's Bluetooth range, passing Apple devices anonymously relay an encrypted location back to you. Two generations share one shell and price; the 2026 AirTag 2 adds a U2 chip and a louder speaker.

04

Battery, sound, and durability

A CR2032 coin cell lasts roughly a year and is user-replaceable in seconds. The tag is IP67 water-resistant; the speaker is how you find it nearby when UWB isn't available.

05

Travel: TSA, airlines, and checked bags

AirTags are allowed in checked luggage — their CR2032 falls under the airline rules for small button cells — and have helped travelers track delayed bags. Some airlines now read AirTag location directly.

Go deeper

The full AirTag Guide library

Every deep dive in this cluster — 151 articles, the curated path first.

AirTag 2 Review: 6 Months of Daily Use, No Sugarcoating Review

AirTag 2 Review: 6 Months of Daily Use, No Sugarcoating

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Best Apple Find My Trackers in 2026: AirTag and 6 More Buying guide

Best Apple Find My Trackers in 2026: AirTag and 6 More

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How to Set Up an AirTag: Complete Setup Guide (2026) How-to

How to Set Up an AirTag: Complete Setup Guide (2026)

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How to Reset AirTag: Factory Reset for Any Scenario How-to

How to Reset AirTag: Factory Reset for Any Scenario

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How to Change AirTag Owner: Remove, Reset and Re-Pair How-to

How to Change AirTag Owner: Remove, Reset and Re-Pair

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How to Share an AirTag With Family Members in 2026 Explainer

How to Share an AirTag With Family Members in 2026

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How to Replace Your AirTag Battery: Step-by-Step Guide How-to

How to Replace Your AirTag Battery: Step-by-Step Guide

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AirTag Lost Mode: What It Does and How to Use It (2026) Explainer

AirTag Lost Mode: What It Does and How to Use It (2026)

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Does AirTag Have Location History? What Find My Shows Explainer

Does AirTag Have Location History? What Find My Shows

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How to Share AirTag Location With an Airline (2026 Guide) How-to

How to Share AirTag Location With an Airline (2026 Guide)

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Do AirTags Work with Android? What You Get (and Miss) Explainer

Do AirTags Work with Android? What You Get (and Miss)

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AirTag 2 Tips, Tricks and Hidden Features You Need to Know Explainer

AirTag 2 Tips, Tricks and Hidden Features You Need to Know

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How to Find a Hidden AirTag in Your Car: Step by Step How-to

How to Find a Hidden AirTag in Your Car: Step by Step

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Best AirTag Alternatives for Android and iPhone in 2026 Explainer

Best AirTag Alternatives for Android and iPhone in 2026

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Best AirTag Alternatives in 2026: Top 6 Trackers Ranked Buying guide

Best AirTag Alternatives in 2026: Top 6 Trackers Ranked

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Xiaomi Tag vs AirTag 2: The $15 Dual-Network Alternative Comparison

Xiaomi Tag vs AirTag 2: The $15 Dual-Network Alternative

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AirTag Low Battery Warning: Why It's Wrong and How to Fix Fix

AirTag Low Battery Warning: Why It's Wrong and How to Fix

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Xiaomi Tag Review: $15 Dual-Network AirTag Rival 2026 Review

Xiaomi Tag Review: $15 Dual-Network AirTag Rival 2026

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How to Install an AirTag Dog Collar Holder (Tools List) How-to

How to Install an AirTag Dog Collar Holder (Tools List)

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AirTag 2 Precision Finding on Apple Watch: Full Guide How-to

AirTag 2 Precision Finding on Apple Watch: Full Guide

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TagVault Pet Review: AirTag Dog Collar Mount Tested Review

TagVault Pet Review: AirTag Dog Collar Mount Tested

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AirTag 2 Battery Drain: Why It Drops Faster and How to Fix Fix

AirTag 2 Battery Drain: Why It Drops Faster and How to Fix

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AirTag for School Backpack: A Parent's Setup Guide How-to

AirTag for School Backpack: A Parent's Setup Guide

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AirTag for Hunting Dogs Field Tested (and the Limits) Explainer

AirTag for Hunting Dogs Field Tested (and the Limits)

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Quick answers

AirTag Guide FAQ

Do AirTags have GPS? +
No. AirTags use Bluetooth plus Ultra-Wideband and rely on the Find My network of nearby Apple devices for location. For real-time tracking of a moving vehicle, see our GPS tracker hub.
Do AirTags work with Android? +
You cannot pair or use an AirTag on Android, only detect an unknown one for safety. Android owners should use a Google Find Hub tracker instead, as we explain in do AirTags work with Android.
How long does the AirTag battery last? +
About a year on a standard CR2032 coin cell, which you can swap yourself in seconds. See how to replace the AirTag battery.
Can I fly with an AirTag in checked luggage? +
Yes. The CR2032 cell is within airline limits and many travelers use AirTags to track delayed bags. Read how to share AirTag location with an airline.
Is AirTag 2 worth it over the original? +
Only if you use Precision Finding constantly or pair with a recent Apple Watch, since AirTag 2 adds the U2 chip and a louder speaker. The full breakdown is in our AirTag 2 review.
What is the best AirTag alternative? +
It depends on platform and use. Cross-network tags like Chipolo Pop bridge iPhone and Android; for non-Apple homes start with AirTag alternatives and the best Find My trackers guide.