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2015 Sports watch heart rate monitor sensor 3D Pedometer watches men running digital wristwatches outdoor chest - Couple Watches

R1 Heart Rate Sleep Monitor Pedometer Smart Bracelet Bluetooth Sport Waterproof Smart Band for Android iOS - Children's Watches

MAX30102 Heart rate sensor module heartbeat pulse oximetry computer direct reading - Demo board

Smart Watch Bluetooth Heart Rate Blood Pressure Fitness Tracker Smart Bracelet ID115Plus Men Women Relogio For - Couple Watches

JAYSDAREL Y11 Heart Rate Monitor Smart Watch Sports IP67 Waterproof Wristband Smart Bracelet Fitness Tracker for - Couple Watches