iPhone 7 Lightning to 3.5mm Audio Charge Headphone Jack Adapter 

Adapters that convert a 3.5mm headphone connector to a Lightning connector have already surfaced in China.
Each adapter features volume and play/pause buttons and two of them have a micro-USB port in addition to the Lightning port.

• Lightning To 3.5mm Power Audio Adapter Cable for iPhone 7 and iPhone 7 Plus
• Designed for iPhone 7 and iPhone 7 + Plus
• Listen to music and charge your phone at the same time
• No charging, software required. Just plug your existing headphones / earphones into the jack.
• Please note: No Microphone support