The motorMOUTH II plugs directly into a vehicle's auxiliary input for hands-free conversations and will stream audio from any A2DP device. Once paired you can use your handset to directly dial or press the multifunction button once for voice dialing. Featuring DSP echo cancellation, it will ensure you have the most pristine conversation every time. Provides an auxiliary relocation cable so you can have a phone conversation wherever you are, clearly picking up your voice. Also ships with a switching audio splitter for directly connecting your music.