HIGH-SENSITIVITY GPS RECEIVER; COLOR HANDHELD MAPPING IDEAL FOR BOTH MARINE & OUTDOOR USE; 2.6", BRIGHT, SUNLIGHT-READABLE 256-COLOR TFT DISPLAY; 64 MB MICRO SECURE DIGITAL CARD™ FOR STORAGE OF OPTIONAL MAP DETAIL ; FAST USB CONNECTIVITY MAKES LOADING CHARTS & MAPS QUICK & EASY; NAVIGATION INSTRUCTIONS CAN BE SHARED WITH REPEATERS, PLOTTERS & AUTOPILOTS USING NMEA PROTOCOLS THROUGH THE DEDICATED SERIAL PORT; DIM: 6.1”H X 2.4”W X 1.3”D; WITHOUT BAROMETRIC ALTIMETER & ELECTRONIC COMPASS