Three technologists in India used a homemade Faraday cage and a microwave oven to get around Apple’s location blocks.

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.

For those 18 years and older with mild to moderate hearing loss, the AirPods Pro 2 can now serve as a clinical-grade hearing aid. Once enabled, you can also toggle on a “Media Assist” setting that uses your hearing test results to optimize the sound of music, phone calls, and video content.