Advanced Multi-zone Technology that gives you independent control of balance, subwoofer and volume in four separate audio zones. Two Class-D amplified zones, plus 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. NMEA 2000 certified, Ethernet connectivity, FUSION-Link, Advanced multi-zone technology - 4 separate zones, AM/FM/VHF/DVD/CD/iPod/iPhone/USB/AUX/Sirius XM Ready. 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, key and LCD backlighting for night time viewing, customizable AUX screen, For water resistant protection of your MTP supported device, install the FUSION UNI-Dock which will protect, charge and play all compatible devices and is large enough to house the Samsung Galaxy S4 with ease. (MS-UNIDOCK is sold separately) Bluetooth Audio Streaming - Add the MS-BT200 or MS-BT100 to your system to enjoy your favorite audio tracks within range, around your vessel.