Meet the Casio PRO TREK WSD-F20: a smartwatch designed specifically for people who spend a lot of time outdoors. It comes with Android Wear 2.0, GPS, altimeter, barometer, activity tracker, and digital compass. The watch is water resistant to 50m. Its battery lasts up to 25 hours. It has a full color map display and works with iOS and Android devices.
This WSD-F20 watch has quad sensors to provide you with real-time notifications as conditions change. It meets MIL-STD-810G standard.[where to get it]