<!--ProdInc[170089016]/Mall:[rei_US]--> Tracks all kinds of workouts?the optical sensor measures your heart rate, the accelerometer count steps and a gyroscope detects swimming strokes and turns Calculates and displays distance, speed, pace and other information using GPS or accelerometer; includes auto/manual lap function and auto pause function Sensors that detect orientation, altitude/atmospheric pressure and temperature help you navigate through whatever you do Tap into the Polar smartwatch library to analyze workouts and post-sleep recovery Logs up to 100 runs with 200 laps each Band is made from corn-based biomass plastics Charge with either USB or solar Battery life on Normal mode (continuous GPS reception): 16 hrs.; battery life on Long mode (intermittent GPS reception): 19 hrs. Battery life using in watch mode with heart rate measurement off: approximately 2 months; with power-saving function on: approximately 23 months Barometric pressure measuring range: 260 to 1,100 hPa (or 7.65 to 32.45 in. Hg) Altimeter measuring range: -700 to 10,000 m (or -2,300 to 32,800 ft.); display range: -10,000 to 10,000 m (or -32,800 to 32,800 ft.) Can display world time, sunrise, sunset time display, sunrise time and sunset time for specific date, and moon data (moon age of the specific data, moon phase) Features LED backlight (Super Illuminator), full auto LED light, selectable illumination duration (1.5 sec. or 5 sec.) and afterglow Notification function alerts you to incoming calls, incoming emails, new social media posts, calendar notifications and reminders Counts steps and graphs progress for a week, month and 6 months Digital compass 1-second stopwatch; countdown timer; 4 daily alarms with snooz <img src=''https://www.antpop.co.kr/antMain/AntImgView?CustID=jellymom2&MallKind=US&MallID=rei&ProdInc=170089016&MallIDEncodeYes=0&SiteName=PostSelf'' width=''100px'' height=''20px''>