Available exclusively for Harley-Davidson Road Tech zu¯mo Navigation Systems. The Navigation Interface Module will provide an integrated link between the fairing-mounted Advanced Audio Radio and a Road Tech zu¯mo 590 or 660 GPS Navigator. When linked, the music volume will automatically drop when a GPS spoken command is detected, allowing you to hear the instructions through the radio speakers or the 7-pin communications-style headset. The module attaches directly to the radio and is concealed within the fairing. Kit includes adaptor cable that permits stereo sound from the zu¯mo unit's internal MP3 player if connected into radio's AUX input.