This is due to bluetooth ANT+ and 5 kHz technologies which can also be active simultaneously. Included components Heart rate sensor, soft strap. Sport Running, Swimming, Cycling, Exercise & Fitness.
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Polar H9 Heart Rate Sensor – ANT + / Bluetooth - Waterproof HR Monitor with Soft Chest Strap for Gym, Cycling, Running, Outdoor Sports : Sports & Outdoors
Polar H9 is the ideal jack-of-all-trades heart rate sensor that connects to a large variety of devices. Thanks to Bluetooth, ANT+ and 5 kHz coded
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