Navigate the world hands-free Durable, constructed to military standards (MIL-STD-810G); night vision goggle compatible Works with GPS, GLONASS and Galileo satellite systems to provide accurate positioning Know where you are with navigation sensors, including 3-axis accelerometer, 3-axis compass and a barometric altimeter; smart notifications allow your device to receive emails, texts and alerts Foretrex 701 adds Applied Ballistics Elite software that calculates aiming solutions for long-range shooting Battery life exceeds 48 hours in navigation mode, up to 1 week in UltraTrac™ mode and up to 1 month in watch mode