LARGE, ULTRA-BRIGHT 5 DIAGONAL QVGA DISPLAY; 234 X 320 PIXELS; PRELOADED WITH CHARTS FOR OVER 14,000 US LAKES & NAVIGABLE RIVERS; BUILT-IN HIGH-SENSITIVITY GPS RECEIVER; 2 NMEA 0183 I/O PORTS; STREAMLINED USER INTERFACE MAKES IT SIMPLE TO SELECT MODES & FEATURES; OPTIONAL BLUECHART G2 VISION CARDS PROVIDE ENHANCED NAVIGATION FEATURES LIKE AUTO GUIDANCE, SATELLITE IMAGERY, 3-D MARINERS EYE; SECURE DIGITAL CARD SLOT; DIM: 5.9H X 6.4W X 2.9DLength: 11.60Width: 8.40Height: 5.40