"5 DIAGONAL VGA DISPLAY; 480 X 640 PIXELS OVER 800 NITS OF BRIGHTNESS; NMEA 2000 CERTIFIED FOR SEAMLESS INTEGRATION WITH THE  MARINE LINEUP; PRELOADED WORLDWIDE MARINE BASEMAP; COMPATIBLE WITH GXM 51 FOR XM SATELLITE RADIO AND XM WX SATELLITE WEATHER; BUILT-IN HIGH-SENSITIVITY GPS RECEIVER; FEATURES DUAL-FREQUENCY TRANSDUCER; POWER OUTPUT: 1000W (RMS) 8000W (PEAK TO PEAK) 1KW XDCR; 500W (RMS) 4000W (PEAK TO PEAK) DUAL FREQUENCY XDCR; OPTIONAL BLUECHART G2 VISION CARDS PROVIDE ENHANCED NAVIGATION FEATURES LIKE AUTO GUIDANCE SATELLITE IMAGERY 3-D MARINER S EYE VIEW & 3-D FISH EYE VIEW; SECURE DIGITAL CARD SLOT; DIM: 5.9"" H X 6.4"" W X 2.9"" D"