Garmin® etrex Venture HC Handheld GPS Unit TFT 256-color, high-resolution display 24MB of internal memory High-sensitivity GPS receiver with built-in patch antenna LED backlit display Built-in Americas auto-route basemap Waterproof Easy-to-read navigational information is displayed on a 1.3"W x 1.7"H, TFT 256-color, high-resolution display. Contains 24MB of internal memory for storing detailed maps. The Venture HC is fully compatible with Garmin's MapSource products so you can have the most up-to-date travel and navigational tools right at your fingertips at any time. The high-sensitivity GPS receiver with built-in patch antenna ensures reliable, high-speed performance in any terrain or conditions. An LED backlit display makes it easy to read, even in total darkness. Each includes a built-in Americas auto-route basemap and is capable of storing 500 user waypoints, a 10,000-point automatic track log with 20 saved tracks. Also includes an elevation computer and celestial tables. Two AA batteries (not included) provide up to 32 hours of use. Waterproof. Includes: USB interface cable, bike mount clip, MapSource Trip and Waypoint Manager CD. Dimensions: 4.2"H x 2.2"W x 1.2"D. Weight: 5.6 oz