Dress you up! A design combining jewelry and a fitness tracker. Take straps in different styles and colors. Find the style that moves you. 24/7 Blood Pressure & Heart Rate: Understand your resting heart rate and blood pressure trends with FITVII 24/7 Heart rate and blood pressure monitoring watch. Provide data support for your exercise planning. Blood Oxygen SpO2: FITVII fitness tracker can measure your blood oxygen saturation and help you understand your physical state. Great for high-intensity workouts and sports like marathons and gym workouts. Sleep Tracking: Better sleep can power your days. Track your time in light and deep sleep to better understand your sleep quality each night. Track all-day activity: Your steps, distance, and calories burned will automatically count and record. Smart Functions: An easy-to-use activity fitness tracker with 7 sports modes and various intelligent features. DIY watch face, call and message notifications, weather, drinking and sedentary reminder, alarm clocks, music control, and female menstruation period reminder. Compatibility: FITVII Slim Fitness tracker compatible with Android 5.0 & iOS 10 and above smartphones with Bluetooth 4.0, but is not compatible with PC, iPad, or Tablet. One full charge gives up to 7-10 days of working time. (varies with use and other factors)