"The new Apple AirPods headphones are compact and completely wireless, so using them is comfortable and effortless. The headphones have optical sensors and an accelerometer to detect when they are in and out of your ears, which in turn allows you to automatically pause and resume music.
You can answer or hang up calls by double-tapping either earpiece. The headphones and the microphone work the same, regardless of whether you use one or two headphones. AirPods use Apple's improved H1 chip, which makes pairing very fast. You can connect them to other devices such as older iPhone models, Mac computers, iPads or iPod touch players via Bluetooth. AirPods are compatible with iPhone, iPad, or iPod touch devices running iOS 12.2 or later, Apple Watch smartwatches running watchOS 5.2 or later, and Mac devices running macOS 10.14.4 or later later."