Polar H9 is misidentified in Polar Flow! : r/Polarfitness

H9 heart rate sensor

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Polar H10 wrong readings : r/Polarfitness

Polar H9, Affordable heart rate monitor chest strap

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How can I update Polar H10/H9?

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

Polar H9 Bluetooth, ANT+ and 5 kHz Coded Heart Rate Sensor