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Amazon.com : POLAR H10 Heart Rate Monitor, Bluetooth HRM Chest Strap - iPhone & Android Compatible, Gray : Sports & Outdoors
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Polar H10 Plus Bluetooth & ANT+ Heart Rate Transmitter (M-XXL) - OPEN BOX - USED 724949053322 | eBay
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Amazon.com : Polar H10 Heart Rate Monitor Chest Strap - ANT + Bluetooth, Waterproof HR Sensor for Men and Women (NEW) : Sports & Outdoors
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