Ideal for Hikers, Skiers & Campers Foretrex 401 is a slim wrist-mounted GPS navigator perfect for outdoor activities that require the use of both hands. It combines a high-sensitivity waterproof GPS receiver, electronic compass and barometric altimeter into a lightweight device ideal for hikers, skiers and campers. To share data easily, you can connect Foretrex to your computer with USB or just send data wirelessly to another device. Retrace Your Steps You ll never worry about getting lost with Foretrex 401. It 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. Keep track of your bearing and altitude.