What Technology Does AirTag Use?

The AirTag uses a combination of two popular technologies to help you find your things. Its location is determined by a network of iPhone users contributing to crowd-sourced location data via iCloud.

The AirTag also uses a new technology, Precision Finding5, supported by iPhone 11 and 12. This feature provides more precise location tracking, including directional finding.

Ultra-Wideband (UWB)

Unlike other trackers that use Bluetooth Low Energy (BLE) to find objects, Apple’s AirTag uses Ultra-Wideband to determine the location of the tag. This technology is made possible by Apple’s custom U1 chip.

Ultra-Wideband is a short-range wireless communication technology that offers precise tracking and positioning. It also offers faster data transfer and secure communications.

It works by sending out very short signals at a high frequency, making it ideal for tagging items that are difficult to locate. It is also more resistant to interference than other technologies, such as Bluetooth, because it operates on a different radio frequency.

Samsung is already using this technology in its SmartTags lineup to help users keep track of their possessions and eliminate the need for a key fob. We can expect it to become more common in other devices, including cars, to improve navigation systems and enhance augmented reality experiences.


Bluetooth is used in everything from earphones to garage-door openers, with wireless communications between devices that can’t physically be connected (see Bluejacking). It can transfer data at high speeds but uses very little power.

Bluetooth BR/EDR can transmit at a maximum of seven devices in a piconet and can be configured as master or slave, with each device having a unique 48-bit address, known as a Bluetooth name. This Bluetooth name is usually set by the user and can be viewed on the list of devices shown by special programs.

AirTags are small devices that can be attached to personal items such as keys or wallets, and allow you to track their location. This allows you to find your lost items with the help of a smartphone app. However, it also raises privacy concerns, as AirTags can potentially be used for stalking. As a result, there are concerns about whether Apple is willing to take steps to prevent this from happening.


AirTags are small tracking devices that attach to items like keys and wallets. They can then be found with an iPhone using the built-in Find My feature. They are a useful tool for people who have lost things, but they have also been used by stalkers and criminals.

Apple is now making it harder for criminals to use the technology. The company recently introduced a new function in iOS 14.5 that lets users see how many times their phones have heard an unknown AirTag in the past three days. This is a step towards more transparency for apps that use location data.

The AirTag is powered by a Nordic nRF52832 Bluetooth SoC, which has multiple radios including NFC and Bluetooth Mesh. The chip is available in a WLCSP50 package, which is 75% smaller than the QFN version. The lower profile means that it can be placed in tight spaces, such as a wallet. This is important because it can significantly increase the accuracy of locating a tag.


NFC technology uses near-field communication to allow devices to make contactless connections. It is a popular technology in the manufacturing industry, where it helps reduce errors and improve efficiency by facilitating the transfer of data between the product and its components. It also allows technicians to quickly access maintenance records, manuals, and specifications.

AirTag uses Bluetooth Low Energy (BLE) and NFC to communicate with the owner’s iPhone or iPad. The BLE connection is secured with cryptography, and the data is encrypting on the phone before being uploaded to the cloud. This process is very time consuming and consumes a lot of battery power. The AirTag is powered by a 3 volt coin cell battery. The chip is a Nordic nRF52832 in a WLCSP50 package, which is 75% smaller than the QFN version used in Apple’s latest iPhone. It also uses a custom U1 chip, which is marked USI. This chip is used to control the AirTag and provide additional functionality such as precision location finding.

Advance to the main page