After Sync Music from iPhone to apple watch, User can stream music or send/receive call on Apple watch Headphone through Apple Watch. So here you can learn how to setup or sync music from iPhone to apple watch and then setup with headphone for listen pure good quality music. For that you must have to
Apple watch music
After Paired/Setup Apple watch with iPhone, Apple watch user can stream or play music on Apple watch or control through watch screen. In this case you can create music playlist in Apple watch. And then user can listen with Apple watch Bluetooth headphones. Here you can learn how to create music playlist in apple watch.