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Polar H10 Heart Rate Monitor - ANT + , Bluetooth - Waterproof HR Sensor with Chest Strap - Built-in memory, Software updates - Works with Fitness apps, Cycling computers, Sports and Smart
Amazon.com : POLAR H7 Bluetooth Heart Rate Sensor & Fitness Tracker (Black, Medium/XX-Large) : Heart Rate Monitors : Sports & Outdoors
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Polar H10 Bluetooth / ANT + Heart Rate Transmitter
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Polar H9 Bluetooth, ANT+ and 5 kHz Coded Heart Rate Sensor
