The Foretrex 401 is a slim wrist-mounted GPS navigator perfect for outdoor activities that require the use of both hands. Foretrex 401 combines a high-sensitivity waterproof GPS receiver, electronic compass and barometric altimeter into a lightweight device ideal for hikers, skiers, campers and military personnel. To share data easily, you can connect Foretrex to your computer with USB or just send data wirelessly to another device. Retrace Your Steps No matter where your adventure takes you, youll never worry about getting lost with the Foretrex 401. Foretrex keeps track of your path and displays it as a dotted trail on the screen. Just turn on Foretrexs TracBack® feature, and you can retrace your path back to where you started. Keep track of your bearing and altitude with Foretrex 401s electronic compass and barometric altimeter. You can save locations in memory as waypoints, so you can always find your way back to any important place, like your campsite or vehicle. And with up to 17 hours of battery life and replaceable AAA batteries, youll never worry about making it back. Track Your Data Foretrex 401 lets you create and store routes to all of your favorite places and provides other helpful information, including a trip computer, sunrise/sunset times and hunting and fishing information. For even more data, connect Foretrex 401 to a wireless accessory, such as a heart rate monitor, cadence sensor, or clip it on your bike with the accessory bike mount. To keep track of your trip, connect your Foretrex to your PC or Mac with USB to store your waypoints, routes and tracks on your computer. You can also share waypoints, routes and tracks wirelessly with another Foretrex 401. Physical & Performance: Unit dimensions, WxHxD: 2.9" x 1.7" x 0.9" (7.5 x 4.3 x 2.3 cm) Display size, WxH: 1.4" x 0.9" (3.6 x 2.3 cm) Display resolution, WxH: 100 x 64 pixels Display type: Black and white LCD Weight: 3.1 oz (87.3 g) with batteries Battery: 2 AAA batteries (not included) Battery life: 17 hours Waterproof: yes (IPX7) Floats: no High-sensitivity receiver: yes Interface: USB RoHS version available: yes Maps & Memory: Basemap: no Preloaded maps: no Ability to add maps: no Built-in memory: no Accepts data cards: no Waypoints/favorites/locations: 500 Routes: 20 Track log: 10,000 points, 10 saved tracks Features: Automatic routing (turn by turn routing on roads): no Electronic compass: yes Touchscreen: no Barometric altimeter: yes Geocaching-friendly: no Outdoor GPS games: no Hunt/fish calendar: yes Sun and moon information: yes Tide tables: no Area calculation: no Custom POIs (ability to add additional points of interest): no Unit-to-unit transfer (shares data wirelessly with similar units): yes Picture viewer: no Whats in the Box: Foretrex 401 Wrist expansion strap USB cable Owners manual on disk Quick start manual