Apple created iPhones but also many accessories. One of them are Airpods. They connect to your iPhone, Apple Watch, iPad or Mac as soon as they are out of the charging case. Put them in your ears and you will immediately listen to the radio. If you take them off, the radio too is off instantly. How can they do this? AirPods use optical sensors and a motion accelerometer to "know" if they’re in your ears. They come with a charging case, their battery charge lasts more than 24 hours and audio and voice when you speak on the phone are of high quality.