All-day tracking of body reactions via cEDA sensor helps you recognise signs of stress so you can intervene quickly Mood logs let you record how you feel in stressful situations and track mood trends over time. Your personal sleep profile can help you understand the quality of your night's rest and how you can improve it. With a wrist ECG, you can check your heart rhythm for signs of atrial fibrillation. The results can be downloaded as a report for discussion with doctors. The health dashboard lets you track your blood oxygen saturation, heart rate variability and other measurements. An EDA scan shows you how your body responds to stress or the relaxation of a mindfulness exercise Daily and weekly summaries give you an overview of how well you're managing stress. Sleep index summarises various factors of your sleep quality, giving you detailed insights into your night's rest High and low heart rate notifications let you know if your heart is beating abnormally fast or slow. Continuous heart rate monitoring determines your resting heart rate, tracks your calories burned and displays your heart rate live - ideal for training The Daily Fitness Index tells you if you're ready to train or if you need to rest When you're training, you'll be notified when you reach your target heart rate zone and accumulate active zone minutes. With built-in GPS, pace and distance are tracked and displayed in real time during outdoor activities - without the need for a smartphone Notifications from your smartphone, Fitbit Pay and Amazon Alexa integration are smart features for your everyday life. With its slim, elegant design, the Sense 2 perfectly underlines your style and always offers a comfortable wearing experience. With a battery life of more than 6 days (depending on usage), you won't have to worry about your Fitbit letting you down.