Always-on health tracking - values such as resting heart rate, blood oxygen saturation and skin temperature tell you a lot about your health and fitness and how well you are looking after your body. Continuous heart rate measurement - fat burning, cardio or peak performance? Track your heart rate zones in real time to train at exactly the right intensity for your goal. Blood oxygen saturation monitoring (SpO2) - The SpO2 value indicates how well the body is supplied with oxygen. Values that are too low can indicate health problems, which you can quickly recognise with Fitbit. Skin temperature monitoring - Fluctuations in skin temperature can provide 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? With various mindfulness exercises, you can learn to deal with stress better and stay calm. Guided breathing exercises - The Relax app is your mindfulness coach on your wrist, guiding you through calming breathing exercises when everything gets too much. Active zone minutes tracking - When training in your target heart rate zones, you collect active zone minutes. You work harder in the cardio and high performance zones, which is why you get double the number of minutes - double the motivation. 20 training modes + SmartTrack. The Inspire 3 offers 20 different training modes and displays statistics such as pace and calories burned in real time. SmartTrack even records common types of training automatically. So you can forget to start a training session. Up to 10 days of battery life - the Inspire 3 won't run out of battery that quickly. Battery life depends on usage behaviour and other factors.