The Polar H10 sensor is placed on the body.

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Already the gold standard upon which consistent and accurate heart rate technology recording is based, the updated Polar H9 is now the most versatile by integrating ANT+ wireless technology. Whether used with your favorite fitness app, 3rd party wearable, or piece of equipment found at your local health club, the Polar H9 will help you get the most out of your training. Polar H9 can be connected to Bluetooth and ant+ devices simultaneously. Double-check compatibility with your favorite app.

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The H10 model also offers unprecedented connectivity, enabling two simultaneous Bluetooth connections as well as ANT+ hook-ups with compatible gym

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