Magellan 330M 2.2 x 1.33-Inch Water Resistant Marine GPS Rugged, floatable 12-channel GPS receiver for navigating on land or water Great for anglers and boaters Features 9 MB built-in map database and additional 7 MB of downloadable memory Database contains waterways, inland lakes, fixed navaids, buoys, obstructions such as wrecks and rocks, and more 500 Waypoints, and 20 routes with 30 legs; includes free MapSend Streets CD-ROM for increased street-map detail and waypoint and route management