Motivation is your best accessory with Fitbit Altaa customizable fitness tracker designed to fit your personal style. Stay motivated by tracking all-day activity like steps, distance, calories burned and active minutes, and get credit for your workouts with SmartTrack automatic exercise recognition. At night, track your sleep and set a silent alarm to wake better and get your best rest. No matter where youre headed, the easy-to-read OLED screen keeps your goals in focus with stats, time, and call or text notifications on display. And with accessory wristbands in metal, leather and sport, help you find the right style for every occasion. Wear fitness your way with Fitbit Alta. Syncing range: Up to 45 m (148 ft). Syncs with Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, Android 4.4 and later, and Windows 10 devices. Choose from a variety of clock faces and pick between vertical or horizontal layouts to see stats your way. Track steps, distance, calories burned and active minutes See stats and time with a bright OLED tap display Battery life up to 5 days (varies with use and other factors) Automatically track how long and how well you sleep, and set a silent, vibrating alarmAutomatically track how long and how well you sleep, and set a silent, vibrating alarm Get call, text and calendar notifications at a glance when phone is nearby. This model does not have a heart rate tracker HTML Product DescriptionProduct will either come in original packaging that is in less than perfect shape and has been opened to inspect contents or will come in non-retail packaging (brown/white box or white/clear bag). Track steps, distance, calories burned and active minutesSee stats and time with a bright OLED tap displayBattery life up to 5 days (varies with use and other factors)Automatically track how long and how well you sleep, and set a silent, vibrating alarmGet call, text and calendar notifications at a glance when phone is nearby. This model does not have a heart rate tracker.