Live your best life with Fitbit Versaa health & fitness smartwatch that lasts 4+ days and features 24/7 heart rate, phone-free music, apps, coaching & more. - Classic wristbands (small and large)Charging cable - Features:Wallet-free payments with Fitbit Pay - Sensors & Components3-axis accelerometer3-axis gyroscope - Optical heart rate monitorAltimeterAmbient light sensor - Vibration motorWiFi antenna (802.11 b/g/n)GPSDisplayTouchscreenColor LCDBattery and Power:Battery life of 4+ days. Battery life and charge cycles vary with use, settings, and other factors; actual results will vary. Battery type: Lithium-polymer. Charge time (0-100%): Two hours. Radio transceiver: Bluetooth 4.0Memory:Saves 7 days of detailed motion data minute by minute. Saves daily totals for past 30 days. Stores heart rate data at 1 second intervals during exercise tracking and at 5 second intervals all other times. - Water Resistance:Fitbit Versa is water resistant to 50 meters. We do not recommend wearing this watch in a hot tub or sauna. - Heart Rate:Like all heart rate tracking technologies, accuracy is affected by physiology, location of device, and different movements. Learn more about wear during workouts. - Syncing & Notifications:Fitbit Versa syncs automatically and wirelessly to computers and 200+ leading i - OS, Android & Windows devices using Bluetooth LE wireless technology. Syncing range: Up to 30 feet. - Certain features like smartphone notifications may require Android 5.0+. Check your device compatibility. Syncing requires Bluetooth LE and 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, i - Phone 4S and later, i - Pad 3 gen. and later, Android 4.3 and later and Windows 10 devices. Music control via Bluetooth Classic on Android and Windows devices. Music control via Bluetooth LE on i - OS devices.