The Scosche Industries motorMOUTH™ II plugs directly into your car’s MP3/AUX input. Your phone conversation will play through your car’s speakers, so you can eliminate uncomfortable earpieces. With DSP echo cancellation, you’ll have crystal clear transmission, even in noisy vehicles. Once set up, you’ll be able to perform most of your phone’s functions, such as answering, toggling between calls, etc. with the motorMOUTH II multi-function button.