Garmin eTrex 30 outdoor handheld GPS navigation device has 176 x 220 pixels resolution transflective, 65-K color TFT display, weight 141.7 gram with batteries, 2 AA batteries battery, battery life 25 hours, waterproof IPX7, high-sensitivity receiver, maps and memory, basemap, ability to add maps, built-in memory 1.7 GB, accepts data cards microSD card, waypoints favorites locations 2000, routes 200, track log 10000 points, 200 saved tracks. Also this Garmin eTrex 30 outdoor handheld GPS navigation device comes with USB interface.