Yes you can charge your iPhone 7 & listen to lightning headphones at the same time*

Belkin Lightning Audio + Charge RockStar
Credit: Belkin/Steve Garfield/Off On A Tangent

* from 10 October

So the iPhone 7 has no 3.5mm earphone socket.

Why? – the major parameter of smartphone design is skinny jeans compatibility – that means small & above all, slim. For the internals of a phone this means make everything smaller (nano SIM) or eliminate it altogether – what happened to the 3.5mm earphone socket in the iPhone 7.

One widely canvassed concern is that it is not possible to connect headphones, speakers, etc. to an iPhone 7 & charge at the same time. There was never any doubt that solutions would be quick to appear. First out of the gate is Belkin's Lightning Audio + Charge RockStar – although not until October.

Macworld
http://www.macworld.com.au/news/charge-and-listen-at-the-same-time-belkin-lightning-audio-charge-rockstar-143706/#.V9udG5N95E4

Cnet
http://www.cnet.com/au/products/belkin-lightning-audio-plus-charge-rockstar/preview/

Belkin
http://www.belkin.com/us/p/P-F8J198/ / Two female Lightning ports 2 female Lightning ports male lightning plug lightning socket lightning plug connector port Belkin new Lightning Audio + Charge RockStar adapter iPhone 7 and iPhone 7 Plus iPhone 7 and iPhone 7 Plus developed closely with Apple paid licensing fee officially brand genuine MiFi certification Made for iPhone Lightning Audio + Charge RockStar plugs into Lightning connector socket Lightning Audio headphones Apple Lightning to 3.5 mm Headphone Jack Adapter charge your iPhone at the same time charging adapter connected connect iPhone battery Belkin Lightning Audio + Charge RockStar dual functionality charging listening charge in the car Belkin adapter ecosystem Lightning Audio headphones compatible Lightning Audio headphones Apple Lightning 3.5 mm Headphone Jack Adapter Apple iPhone 7 Smart Battery Case battery packs available mid-October Belkin Apple retail stores /