The KCA-RC35MR marine wired remote control is compatible with Kenwood marine and in-dash head units that feature a SWC remote wire (blue/yellow). Remote control is designed to withstand the harsh marine environment and features source selection, music search, volume up/down, and mute control buttons. Backlit illumination provides easy visibility at night. The Kenwood KCA-RC35MR is designed to be surface-mounted using the supplied mounting bracket and hardware. The KCA-RC35MR offers a 4-wire installation; Ignition (red), Remote (blue/yellow), Illumination (orange), and Ground (black). The attached 4-wire harness is only 8" long and may require the purchase of additional lengths of wire (sold separately).