Fitbit app. Daily Readiness Score 24/7 HR data and GPS. Active Zone Minutes. Auto detects and tracks when exercising. Displays steps distance and calories. Water resistant up to 50 M. SpO2 (Blood Oxygen) Tracking. Skin Temperature Variation. Menstrual Health Tracking. Less stress with Mindfulness Sessions and Reflections. Sleep Score. Up to 10 day battery. Get phone notifications. Silicone bands with buckle and tang. Small wristband: 5.4" - 7.6" circumference. Large wristband: 7.6" - 8.7" circumference. Includes 2 wristbands and charging cable.
