• EDA Scan app detects electrodermal activity which may indicate your body’s response to stress and a built-in skin temperature sensor logs yours each night so you can see when it varies
• Assess your heart for atrial fibrillation –a heart rhythm irregularity- and easily share results with your doctor (The Fitbit ECG app is only available in select countries. Not intended for use by people under 22 years old.Operating temperature: 14° to 113°F
• An on-wrist skin temperature sensor tracks yours each night so you can see how it varies. You can also see your nightly blood oxygen levels at a glance with our collection of clock faces.Maximum operating altitude: 28,000ft
• High & low heart rate notifications alert you if yours seems above or below your average
• Battery lasts 6 plus days plus, fast charging gives you a full day’s charge in just 12 minutes (Varies with use and other factors; up to 12 hours with continuous GPS)
• Use built-in GPS during runs, hikes, rides and more to see pace & distance without your phone and use the built-in mic and speaker to take Bluetooth calls hands-free when your phone is nearby (Requires more frequent charging)
• Use Google Assistant or Amazon Alexa Built-in to get quick news, set bedtime reminders and alarms, control your smart home devices and more just by speaking to your watch

24/7 Heart Rate Tracking, Oxygen Saturation (SPO2) Monitoring, Sleep Stages and Sleep Score, Skin Temperature Variation, All-day Activity Tracking

Built-in mic and speaker to take Bluetooth calls hands-free, Google Assistant or Alexa Built-in

Get notifications for calls, texts, calendar events and apps like Gmail and Facebook

Built-in GPS, Guided Breathing Sessions, Menstrual Health Tracking, Bright AMOLED Display With Hundreds of Clock Faces