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1.59in l x 1.59in w x 0.49in h. ECG, stress sensing and a skin temperature sensor. Get notifications for calls, texts, calendar events and apps like Gmail and Facebook plus send quick replies and voice replies right from your wrist.
Compatibility Apple iOS 12.2 or higher, Android OS 7.0 or higher, Syncing range Up to 30ft, Music control via Bluetooth Classic on Android and Bluetooth LE on iOS devices.
Built-in GPS + GLONASS, Speaker, Microphone, Multi-path optical heart rate sensor, IR sensors for oxygen saturation (SpO2) monitoring
Water-resistant to 50 meters. Battery life up to 6+ days. Heart rate tracking technology. Saves 7 days of detailed motion data minute by minute.
US Warranty. In Box Fitbit Sense, Classic wristband (both small & large), Charging cable