Goliton? Car DVD Nvigtion Bluetooth Microphone Mic Assembly for Kenwood W01171805 / W01176815 The is an optional external microphone for select Kenwood in-dash head units with built-in Bluetooth that feature a 3.5mm microphone input. The microphone can also be used with external Bluetooth interface module . The Mic will provide better performance in noisy environments. This is aftermarket part that will work with most Kenwood models.