The Freestyle USA Women"s Shark Slim Watch is sporty, fun, and easy to wear in any situationAAAfrom paddling out to going to work (and whatever trouble you have planned for afterward). The Shark Slim"s digital module is easily removable, making it easy to adjust the time and replace the battery. Product FeaturesHousing Material: siliconeStrap Material: siliconeHeart Rate Monitor: noDigital Compass: noChronograph: noBacklight: yesComputer Compatible: noWater-Resistant: yes, 30mAlarms: Date Indicator: yesWeekday Indicator: Battery Type: Battery Life: Face Size: 38 mmWeight: Recommended Use: surfing, beaching, casualManufacturer Warranty: limited lifetime