Pro Trek by Casio Smart Outdoor Watch WSDF20BK G-Shock Gravity Master 35th Anniversary Edition GPW-2000TFB-1A This watch can work with

This watch can work with minimal or minor deviations in the conditions of the magnetic field

Powering this 44mm stainless-steel watch is an automatic movement

The metal bezel

up to 13 hours in GPS mode or up to 25 hours in UltraTrac™ battery saver mode

Pro Trek by Casio Smart Outdoor Watch WSDF20BK G-Shock Gravity Master 35th Anniversary Edition GPW-2000TFB-1A This watch can work withPro Trek by Casio Smart Outdoor Watch WSDF20BK OS: Android Wear 2. 0 (used with Smartphone running Android 4. 3+ or later. For models for which operation has been confirmed, refer to the Google check page. http: www. android. com wear check ) (iPhone*5, equipped with iOS 9. 0+ or later: iPhone 5 or later, with limited functionality.) 50 Meter Water Resistant Military Standard MIL STD 810G (United Stated Military Standard issued by the U. S. Department