Polar - Introducing Polar OH1 optical heart rate sensor. Optimized for use on the lower or upper arm, Polar OH1 provides an alternative method for measuring your heart rate during training. In
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Polar A360 makes the jump to wrist-mounted heart rate monitoring & touch screen interfaces - Bikerumor
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Polar A360 Fitness Tracker with Wrist Heart Rate Monitor (Blue, Medium) : Sports & Outdoors - Amazon.com
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