Yes you can. I have a 5s with a lightning adapter. Everything works as it should. I also keep my cardo scala headset connected with Bluetooth to use Siri and answer calls from the helmet. Let me know if you have any other questions.
Master Sergeant, USMC Retired
2002 HD Sportster 1200 Custom -sold
2013 XCT Boardwalk Blue picked up 1/21/2014
Vance and Hines hi output slip-ons
Lloydz hi-flow air filter
Lloydz ATS @ +4
CrossRoads HID's Hi and Low