By now, everyone has seen many jokes and videos made about the lack of phone jack on iPhone 7. You could put a 3.5 mm to a lightning adapter, but that would mean you cannot charge the phone at the same time. We have a solution for you:
iPhone 7 Headphone Jack & Charging Adaptor contains a 3.5 mm headphone jack and a lightning charging port, enabling you to listen to music and charge your iPhone at the same time. No software to install. Simply plug and play. Now, you can listen to music via your favorite phone and charge your phone all at the same time.