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Polar Black H10 Heart Rate Sensor Replaces H7 With 5 kHz Transmission & Bluetooth Low Energy - M/2XL Diet & Fitness - Newegg.com
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Amazon.com : Polar H9 Heart Rate Sensor – ANT + / Bluetooth - Waterproof HR Monitor with Soft Chest Strap for Gym, Cycling, Running, Outdoor Sports : Sports & Outdoors
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