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Amazon.com : Polar H7 Bluetooth Heart Rate Sensor & Fitness Tracker (Black, X-Small/Small) : Heart Rate Monitors : Sports & Outdoors
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Polar H10 - H9 - Verity Sense - Heart Rate Sensor - ANT +/Bluetooth Connectivity ECG Measurement Waterproof Replaceable Battery Compatible with Sports Watches Smart Watches Exercise Equipment: Amazon.de: Sports & Outdoors
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