Adds Bluetooth Handsfree Calling to the OEM radio.Adds 4 channel Bluetooth Music streaming.Adds an auxiliary audio input.Automatically pauses BT Streaming when a call is received, and resumes when the call is ended. – Allows user to answer, end calls track up and track down using the steering wheel controls.DSP and Echo-Cancellation allows for clear conversations on both sides of the phone call. – Automatically mutes any source as soon as a call is received, and resumes when call is ended.Allows any previously paired mobile phone to automatically re-connect to the Bluetooth interface. – Hear Navigation App voice prompts from the factory speakers while in Bluetooth mode.