With a new high-sensitivity chipset, the Garmin Venture HC GPS receiver helps you get off the beaten path without losing your signal. New high-sensitivity chipset delivers super-fast signal aquisition and lock for reception in narrow valleys, dense woodlands and urban jungles. 256-color TFT technology produces a bright display that can be read in direct sunlight and is backlit for easy night viewing. Comes pre-loaded with U.S. base map accepts detailed maps from MapSource software, sold separately. Follow 50 reversible routes with up to 250 user waypoints per route waypoints can be named and indexed by graphic symbols within GPS unit. Audible alarm sound signals anchor drag, destination arrival, off-course, proximity waypoint and clock time functions. Trip-computer calculates current and average speed, sunset and sunrise times, trip time and total distance over ground. Weatherproof case keeps unit functioning in wet conditions waterproof to IEC 529 lPX7 standards. WAAS Wide Area Augmentation System enabled receiver delivers sub-3-meter accuracy. Two AA-size batteries sold separately supply up to 14 hours of typical use. Compatible with most MapSource products, including BlueChart , City Navigator and U.S. TOPO 24K. Includes MapSource Trip and Waypoint Manager software for transferring routes and waypoints easily via high-speed USB interface. Comes with: Venture HC, USB interface cable, lanyard, MapSource software, owners manual and quick reference guide.