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Polar H9 Bluetooth, ANT+ and 5 kHz Coded Heart Rate Sensor
Amazon.com : Polar T31 Coded Chest Transmitter and Elastic Strap - Black : Heart Rate Monitors : Sports & Outdoors
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Amazon.com : Polar T31 Coded Chest Transmitter and Elastic Strap - Black : Heart Rate Monitors : Sports & Outdoors
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