Advanced Multi-zone Technology for independent control of balance, subwoofer and volume in four separate audio zones. Two Class-D amplified zones, four zone line outs and four subwoofer line outs. Connect additional FUSION marine amplifiers for additional speakers and to expand the system to 3 or 4 Zones. Volume can be independently adjusted in each audio zone from the entertainment system, or connect a wired remote in each zone for localized control. Monitor marine VHF channels through the stereo for weather reports, coast guard information, chatter from other boats and more. Key Features: NMEA 2000 certified, Ethernet connectivity, FUSION-Link, Advanced multi-zone technology - 4 separate zones, AM/FM/DVD/CD/VHF/iPod/iPhone/USB/AUX/Sirius XM Ready (USA only, requires an additional Sirius XM tuner module SVX100). 280 watt total output, Hi-Fi Class-D amplifier, daylight viewable 2.7" color TFT LCD screen, rugged aluminum die-cast chassis, powerful ARM 9 350MHz processor, 360 degree IPx5 water resistance, customizable AUX screen, key and LCD backlighting for night time viewing, controls iPod music library from FUSION"s innovative interface with album art displayed. AUX in connects mp3 players to entertainment system. USB socket at the rear for usb/iPod/iPhone audio playback. For water resistant protection of your iPod/iPhone or USB flash drive, connect the optional MS-DKIPUSB dock.