Garmin eTrex Summit Waterproof Hiking GPS Palm-size global positioning system (GPS) pinpoints location anytime, anywhere--regardless of cloud cover or weather Automatic track log with two-way navigation; stores 10 custom tracks Navigates up to 50 waypoints in sequence with animated graphical interface Waterproof case; adjustable, backlit LCD; battery-save feature Compatible with optional Garmin MapSource software for downloading trip and waypoint data (not map compatible)