Base map of North America. 16MB covers the United States database of major highways, state parks, waterways, airports and cities. Backlit keypad and display. 12 parallel channel, WAAS enabled. Store up to 20 routes, 500 waypoints and 2,000 track points. Backup memory. Satellite status display. Best fish and game calculator. Sunrise/sunset calculations, Quadrifiler helix antenna. Up to 14 hours of continuous battery life. Uses 2 AA batteries. Waterproof. Rugged extensive rubber armoring. Display size: 1.75"W x 2.2"H. Comes with PC cable and user's manual .