Dynamic Personal Coaching Start dynamic personal coaching on your wrist with on-screen guidance for every move and routines that adapt based on your feedback. Store & Play Music Store and play 300+ songs on your watch-plus download your favorite stations or curated workout stations from Pandora.** Built-In GPS See pace, distance and other key stats on display, while recording elevation climbed, split times & a map of your route. PurePulse® Heart Rate Get continuous, automatic, wrist-based heart rate & simplified heart rate zones. Learn more. Water Resistant up to 50M & Tracks Swims Wear your watch in the pool or rain & use it to track swim workouts with stats like lap counting, duration and calories burned. Multi-Day Battery Battery life of 4+ days and up to 10 hours when using GPS, so you can track day to night without charging.* Popular Apps Get instant access to important information like weather or sports updates & popular apps like Strava and Starbucks. Payments With a built-in NFC chip, you can use your credit and debit cards on-the-go, anywhere that accepts contactless payments. Multi-Sport Modes Track specific workouts in modes like Run, Bike or Weights to see real-time stats on screen & get post-workout summaries. SmartTrack™ Automatically record select exercises like running, biking and more & see them saved in the Fitbit app. All-Day Activity Track steps, heart rate, distance, calories burned, floors climbed, active minutes, hourly activity & stationary time. Smartphone Notifications See call, text or calendar notifications on screen & get push notifications from your favorite apps. Available when your phone is nearby. Sleep Stages & Insights See your time spent in light, deep and REM sleep stages & get personalized insights to help you improve. Learn more. Accessory Bands Use the quick release button to switch your accessory bands to styles in leather & more. Syncs Wirelessly Sync stats wirelessly & automatically to computers and 200+ leading iOS, Android and Windows devices. FB503GYBK