Garmin Geko 301 Waterproof Hiking GPS Compact 12-channel GPS receiver with high-contrast display (100 x 64 pixels) WAAS-enabled for 3-meter accuracy; built-in electronic compass and barometric altimeter Stores 500 waypoints and 20 routes with 125 waypoints per route Easy operation: five buttons for one-hand use 12-hour operation on 2 AAA batteries; includes serial PC interface