In case you missed it, the new iPhone doesn’t have a headphone jack. If you still need one to connect your old headphones, you can always use the adapters Apple will provide. The Belkin Lightning Audio + Charge RockStar can also help. It lets you listen to audio through the Lightning port while charging.
This product is designed for iPhone 7 and iPhone 7 Plus. It features 12W pass-through charging to charge your smartphone fast and up to 24-bit 48kHz lossless output. You can pre-order one of these for $39.99.[Source]