Fitbit Sense Advanced Health Smartwatch - Soft Gold

1.59 in L x 1.59 in W x 0.49 in 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 30 feet, 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