Fitbit Alta HR Heart Rate Wristband, Large

Fitbit’s slimmest design yet All-day use of this heart rate band during workouts and beyond With heart rate, you can better measure calories burned and use zones (Fat Burn, Cardio and Peak) to find the right workout intensity for your goals See how working out more can improve your health by comparing your resting heart rate trends to your activity Features Pure Pulse heart rate and SmartTrack automatic exercise recognition Track your all-day activity and sleep Stay connected with smartphone notifications Available in sizes S, L Available in black, blue-gray, coral, fuchsia Available in Small: Fits wrists 14 cm 17 cm in circumference, Large: Fits wrists 17 cm 20.6 cm in circumference Optical heart-rate tracker 3-axis accelerometer Vibration motor OLED tap display We recommend charging Alta HR every few days to ensure you are always tracking. Battery life up to 7 days. Battery life and charge cycles vary with use, settings, and other factors; actual results will vary. Battery type: Lithium-polymer Charge time: One to two hours Radio transceiver: Bluetooth 4.0 Memory Saves 7 days of detailed motion data – minute by minute. Saves daily totals for past 30 days The Fitbit Alta HR wristband is made of a flexible, durable elastomer material similar to that used in many sports watches. The tracker is made with surgical-grade stainless steel, and the buckle is made with aluminum. The Alta HR gunmetal tracker is made with premium PVD plating, and the rose gold tracker is plated with 22k rose gold. Using Bluetooth LE wireless technology, Fitbit Alta HR sends smartphone notifications and syncs automatically to computers and 200+ mobile devices. Smartphone notifications may require Android 5.0+. Look up your device to check compatibility. Syncing range: Up to 6.1 m Syncing requires Bluetooth LE and an Internet connection. Windows 10 computers that do not have Bluetooth LE will need a wireless sync dongle in order to sync. Syncs with Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, Android 4.3 and later, and Windows 10 devices.