HandsFree AUX Cable Integrated stereo-audio cable with hands-free microphone for your iPhone and smartphones. Plug in and say hello to the easiest-to-use handsfree kit your iPhone has ever seen. Griffin's HandsFree AUX Cable combines a stereo audio cable with a high-sensitivity microphone so you can connect your iPhone to your car stereo and talk hands-free with a single cable. Zero-configuration, zero-setup, just plug the slender microphone into your car's AUX-In audio jack and the 1/8 (3.5mm) stereo mini jack into your iPhone. Listen to your music through your car stereo. Use the inline controller to play, skip backward and skip forward as you listen you your iPhone of iPod. Then when a call comes in, click the in-line switch to answer and talk while you keep your eyes on the road and your hands on the wheel. The incoming call audio plays through your car's speakers while the microphone picks up your voice loud and clear. Click again to end the call.