Always-on health tracking - readings like resting heart rate, blood oxygen saturation and skin temperature tell you a lot about your health and fitness - and how well you're taking care of your body Continuous heart rate monitoring - fat burning, cardio or peak performance? Track your heart rate zones in real time to train at exactly the right intensity for your goal Monitor blood oxygen saturation (SpO2) - SpO2 indicates how well the body is oxygenated. Low levels can indicate health problems - which you can quickly detect with Fitbit Monitoring skin temperature - Fluctuations in skin temperature can give early warning of changes inside or outside the body - from the onset of a fever to a too-warm bedroom to the start of your period Mindfulness exercises - Too much stress? Learn how to manage stress and stay calm with a variety of mindfulness exercises Guided breathing exercises - The Relax app is your mindfulness coach on your wrist, guiding you through calming breathing exercises when things get too much Tracking active zone minutes - As you train in your target heart rate zones, you accumulate active zone minutes. You'll work harder in the cardio and peak zones, so you'll get double the minutes - double the motivation! 20 workout modes + SmartTrack - The Inspire 3 offers 20 different workout modes and displays statistics such as pace and calories burned in real time. SmartTrack even automatically records common workout types. So you can forget to start a workout - up to 10 days of battery life - more than a week's worth of battery life - the Inspire 3 won't run out that fast. Battery life depends on usage and other factors.