The Fitbit Sense 2 Advanced Health and Fitness Smartwatch in Blue Mist is an advanced activity tracker designed for both indoor and outdoor use. It provides detailed measurements of heart rate, time, calories, and distance, and has a battery life of up to 6 days. Crafted from aluminum, this smartwatch is compatible with both iOS and Android operating systems, and features Bluetooth connectivity, alarm, calorie monitor, and average heart rate tracking. With SpO2 and accelerometer sensors, it is ideal for activities such as gym training, yoga, and running.