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.

With its new hearing health features, Apple has once again blurred the line between medical devices and consumer gadgets.