One end is micro USB portion that goes into the charging port of the phone and the other end is the jack access for your headphones. Keep in mind with this product, you do lose the ability to charge your phone using that port when you are listening to your wired headphones. However, if you are looking to charge and listen simultaneously, this is a 3rd party product to check out - Belkin - Lightning Audio with Charge Adapter - White; Model: F8J198BTWHTSKU: 5710888. Good luck!