Features:colormax 1515" color lcd gps / waas charting systembrilliant 15" daylight viewable lcd display! the new si-tex colormax 15 lcd c-map max/nt+ charting system features ultra-fast processor, gps waas receiver, programmable guardian grounding alarm, two video input ports for connecting cameras, second station capability and is expandable to an all-in-one gps charting system/fishfinder/radar with optional sensors.big 15" color active matrix lcd display with 1024 x 768 pixel resolution and 500 nit brightness plus adjustable brightness and backlighting.new ultra-fast processor gives you instant screen changes.features two remote video ports, allowing you to connect existing or optionally available cameras and one video output port allowing you to connect to any standard monitor with video input for second stationexpands to an all-in-one gps charting system/fishfinder/radar with optional es502 fishfinder module and optional 2kw to 4kw mds radar sensors.gps waas 18-channel receiver will put your boat within 3 meters of your waypoint in most situations.guardian programmable anti-grounding feature lets you know if your current course takes you within preset distance of charted shoals, obstructions or other areas where the water is too shallow for your vessel's draft.compatible with the new c-map max charts, technically the most innovative c-map charts ever designed.dual c-map c-card slots.depth graph feature accepts input from onboard sounder or optional active transducer to This