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; INCLUDES A BAROMETRIC ALTIMETER FOR EXTREMELY ACCURATE ELEVATION & VERTICAL PROFILE DATA; ELECTRONIC COMPASS DISPLAYS ACCURATE HEADING WHILE STANDING STILL; DIM: 6.1”H X .4”W X 1.3”D; WITH BAROMETRIC ALTIMETER & COMPASS