Polar Loop Crystal is like a piece of jewelry but with intelligence inside. This activity tracker will monitor your daily activity and sleep patterns - motivating and guiding you towards improved fitness and health. Unique Polar technology enables the Polar Loop Crystal to track your daily activity at five intensity levels: resting, sitting, low, medium and high. Low to high intensity movement fill up your activity bar so you can easily see how much progress you are making. The activity goal on the Polar Loop Crystal is customized to your personal details and choice of activity level. You can also combine this activity tracker with Polar H7 bluetooth heart rate sensor strap to get accurate heart rate on your wrist during exercise. Polar Loop Crystal is stylishly embellished with crystals from Swarovski®, and because of its tactile and flexible material, the tracker sits perfectly on your wrist.