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Exercise Monitor Bands With Heart Rate Monitor Calorie Step Counter Activity Bracelet H4Introduction:Our smart fitness bracelet H4 is a professional personal fitness tracker, you can use it to monitor your heart race, step taken, distance traveled, calories burned. And it also is a health wristband, it can monitor your blood oxygen, your sleep time and quality. It also is a good assistant in your life and work, it can use to be call and SMS reminder, sedentary reminder, event reminder, tell you do the right things and the right time.Functions of the fitness wrist monitor:Heartrate monitorBlood