Garmin Foretrex 601 Robust, developed according to military standards (MIL-STD-810G) Compatible with night vision goggles Exact position due to GPS, GLONASS and Galileo Positioning thanks to navigation sensors, 3-axis accelerometer, 3-axis compass, barometric altimeter, smart notifications1 to receive eMails, text messages, and alarms Up to 48 hours of battery runtime, up to one week in UltraTrac mode, and up to one month in clock mode Touch screen Point-to-point navigation Heat resistant, shock resistant, water resistant Acoustic signals1 When paired with a compatible smartphone.