Details Brand Casio Model Pro Trek 3100 Battery Life 22 months Use Tracking Latest Version Yes Key FeaturesComfortabilitySizeAccessoriesStyleActivitiesBasic FeaturesAdvanced FeaturesConnectivityEase of UsePower SourceAccuracyFaceBandAppsSizes AvailablePriceBottom Line Key Features Key Features • Scratch resistant Sapphire glass watch face• non-reflective coating on watch face• Water resistant up to 100 meters• Battery life up to 22 months• Counts down time to sunset and sunrise• Auto light switch• Stopwatch, alarm clock, and compass functions• Tough Solar technology uses the sun...