With a touchscreen interface, incredible map presentation, geocache gaming and a vivid display, the Garmin Oregon 300 delivers a versatile and fun GPS experience. Large, sunlight-readable screen offers crystal-clear colors and high-resolution images. Easy, intuitive touchscreen operation is fun and simple to use. Enjoy vibrant 3D walk the trail maps with Topo 2008 mapping software, sold separately. Waterproof MicroSD card slot for storing additional data accepts Garmin MapSource and BlueChart data cards and software. Built-in electronic compass and barometric altimeter provide additional navigational aid. Supports Geocaching.com GPX files for downloading detailed geocache descriptions, terrain, difficulty and hints directly into GPS unit. Groundspeaks Wherigo Player application comes pre-installed and includes an instructional tutorial learn more at www.wherigo.com. Basemap with 850 MB built-in memory stores up to 1,000 waypoints, 50 routes and 20 tracks with up to 10,000 points Digital Elevation Model shading enhances map view. Enjoy effortless sharing of waypoints, tracks, routes and geocache locations between Oregon and Colorado series units with ANT wireless communication function. High sensitivity receiver and HotFix satellite prediction provide rapid first fix and help maintain signal, even in urban canyons and under dense foliage. WAAS Wide Area Augmentation System enabled receiver delivers accuracy to within 10 ft. in North America. Offers configurable profiles for end use-auto, marine, recreation, fitness or geocaching. Operates on two AA batteries sold separately. Rugged, waterproof construction protects unit from bumps, dust and moisture meets IEC 60529 lPX7 standards can be submerged 1m for up to 30 minutes. Compatible with Garmin heart rate monitors and GSC 10 Speed and Cadence Sensor, sold separately.