C9 Smartband Bracelet Wristband Heart Rate Monitor Blood Pressure Waterproof Stopwatch Smart Band for Android iOS you can choose Bluetooth because

you can choose Bluetooth because of hands free for outdoors and indoors

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Universal Compatibility - Bluetooth 4

C9 Smartband Bracelet Wristband Heart Rate Monitor Blood Pressure Waterproof Stopwatch Smart Band for Android iOS you can choose Bluetooth becauseProduct Features: Overview Track your sports and health status with the fitness tracker smart wrist band. Its' tracking functions are not only for the data of your body but also for improving your motivation to get out and be more active! In addition, the slim and sleek wristband will suit most of your dressing in all occasions. Key Features Monitor your dynamic and static heart rate before and after sports activities Monitor your blood pressure and