Updated: May 11, 2017
The iPhone 7 and iPhone 7 Plus are Apple’s first iPhones to drop the headphone jack. And while you can keep using your old headphones by plugging them into the adapter that comes in the box, that gets old as soon as you discover you left the little dongle at home connected to a speaker, and you can’t listen to any music.
You’ve got two options. One, stick with a cable and buy some Lightning headphones. That’s fine, but then you can only use them with recent-vintage iOS devices, and you can’t charge your device while you use them. Or two, go wireless. That means Bluetooth, either the vanilla kind, or Apple’s augmented Bluetooth headphones, with the special W1 chip added to make pairing easier.