FREE SHARK Smart Ring for iPhone and Android Waterproof Black Size 11 New in Box

FREE SHARK Smart Ring with Sleep Monitoring, Step Counting, Heart Rate, for iPhone and Android, No Subscription Fee, Waterproof Health Tracker in Black Size 11 New in Box Refer to the size chart and measure circumference of your finger This Free Shark fitness ring will accurately monitor the quality of your sleep, and record in detail the durations of deep sleep and light sleep, as well as the specific situations of your wakeful states. The Free Shark Smart Ring has a variety of powerful health monitoring modes. Whether it's running, walking, hiking, cycling, yoga, dancing, skipping rope or other sports, it can automatically and accurately track key data such as the exercise route, exercise time, steps taken, heart rate, speed, calories burned and exercise distance in the app. Moreover, it can continuously track important health data such as heart rate, blood oxygen and blood pressure throughout the 24 hours of the day. The Free Shark Smart Ring has excellent waterproof performance, with a waterproof depth of up to 80 meters. After a full charge, the battery can last up to 5 days, easily keeping up with your busy lifestyle. When used with the smart charging case, the usage time can even exceed 30 days. Compatible with both Android and iOS systems. With the Free Shark Smart Ring, you don't need to pay any subscription fees, and you can unlock the full range of functions of the Free Shark Smart Health Monitoring App for life.