Just when you thought it was safe to blow off your run or ride, the Freestyle USA Predator Nylon Watches alarm blares loudly for you to get your butt up and out of the house. Product FeaturesHousing Material: polycarbonateStrap Material: nylonHeart Rate Monitor: Digital Compass: Chronograph: yesBacklight: yesComputer Compatible: Water-Resistant: yes, 100mAlarms: 2Weekday Indicator: yesBattery Type: Battery Life: Face Size: 40 mmWeight: Recommended Use: swimming, running, bikingManufacturer Warranty: lifetime