The Garmin Foretrex 301 Waterproof Hands-Free GPS Navigator with USB Interface is a cleverly simple slim wrist-mounted navigator perfect for outdoor activities that require the use of both hands. It combines a high-sensitivity GPS receiver, rugged, waterproof design and USB interface into a lightweight device ideal for hikers, skiers, campers and military personnel. This unit keeps track of your path and displays it as a dotted trail on the screen. Just turn on the TracBack feature and you can retrace your path back to where you started. You"ll never need to worry about getting lost. Package Content: Foretrex 301USB cablewrist expansion strapCD ROMmanual / warranty TracBack feature can retrace your path Track log 10,000 points and 10 saved tracks 500 waypoints, favorites or locations 20 routes Hunt/fish calendar; Sun and moon information Height 1.70 Width 2.90 Depth 0.90Weight 0.19 Color Operating System Batteries Included Batteries Required Number of Batteries 2 Battery Type AAA batteries (not included) Language English Assembly Required