Compatible with most popular phones and tablets running on the latest versions of Android and iOS. Do more and charge less with 7+ day battery life Track steps, calories burned and distance 40 unique exercise modes, you can set personal goals and get key workout stats for everything from daily runs and bike rides to HIIT workouts, strength training and more Water resistant up to 50 metres, which means youre free to swim, sweat and more without worry See your pace and distance during outdoor workouts-no phone necessary-using built-in GPS, then see a map of your workout route in the Fitbit app Real-time heart rate streaming DJ your workouts right from your wrist with YouTube Music controls. Start, stop and skip over 100 million songs from the world's largest music catalogue Find your way seamlessly with turn-by-turn directions from Google Maps No more fussing with credit cards or cash post-workout-just tap, pay and go with Google Wallet on your wrist Get notifications for calls, texts and smartphone apps like Google Calendar, Gmail and WhatsApp-plus send quick replies right from your wrist.