MyZone's hybrid heart rate monitor combines chest sensor precision with the flexibility of a wearable | Engadget
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Amazon.com : Rich Green Valley Heart Rate Monitor Replacement Strap Band Compatible with myzone Replacement Strap MZ Switch (1, Red, S) : Sports & Outdoors
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Amazon.com : Rich Green Valley Heart Rate Monitor Replacement Strap Band Compatible with Myzone Mz-3 & Mz-1 Strap (Black, Small) : Sports & Outdoors
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