Fitbit FB421SRBU Charge 5 Advanced Fitness Health Tracker, Steel Blue

Charge 5 Advanced Fitness Health Tracker FeaturesUp to 7 Days of Battery LifeOn-Wrist Heart Rate Monitor & ECG AppMonitor Stress with EDA ScansTrack Sleep, SpO2, HRV, Breathing & MoreBuilt-In GPS Navigation & Route Planning20 Different Exercise ModesSmartTrack Automatic Exercise DetectionSwimproof Water Resistance up to 164'Receive Call, Text & App NotificationsIncludes 6 Months of Fitbit PremiumOperating System Compatibility:Apple iOS 12.2 or higher, Android OS 8.0 or higher, Certain features like smartphone notifications may require Android 8.0+, Syncing requires Bluetooth LE and internet connection, Syncs with Mac OS X 12.2 and up, iPhone 5S and later, Android 8.0 and later.Sensors:GPS, GLONASS, 3-axis accelerometer, Red and infrared sensors for oxygen saturation (SpO2) monitoring, Device temperature sensor (skin temperature variation obtainable in the Fitbit app), Vibration motor, Ambient light sensor, NFC, Multipurpose electrical sensors compatible with ECG app & EDA Scan appSpecificationsColor: Steel BlueType: Activity TrackerWristband: Infinity BandWearable: YesHeart Rate Monitor: YesDigital Read Out: YesWater Resistant: YesBattery Type: Lithium-PolymerApp Compatible: YesWater Resistance Depth: 50mAlerts & Alarms: YesConnectivity: BluetoothBattery Life Hours: Up to 7 DaysCharge Time Hours: 2Operating Temperature: 14° to 113°FStopwatch: YesWeight: 0.19 lbs