Compact, powerful, economical, rugged, waterproof (also floats), full-featured GPS. Built-in Mapping. 12 parallel-channel receiver. 3 meter positioning accuracy. Quadifiler Helix antenna for superior tracking in harsh environments. 9 key keypad with large easy read display. 2MB North American base map of roads, waterways, parks, airports & more. 4MB built-in memory for additional detailed map downloads. 7 navigation screens. 2 AA batteries (not included). User's Manual & PC Cable Included.