Apple's AirPods Pro 2 now have a “hearing aid feature”: a hearing test and the ability to amplify sound for mild or moderate hearing loss, with a free software update.

The hearing aid feature is available with AirPods Pro 2 models, and requires an iPhone or iPad to set it up. It starts with built-in tests that will help users determine if they have hearing loss, set up the feature if they do, and set personalized amplification levels.

Now that iOS 18.1 is available to the masses, Apple’s new hearing aid feature is ready for use. The tool is one of three hearing health items the company announced alongside the iPhone 16 in September.