Long battery life and a subtle look: The Withings Steel HR is swim-friendly and low-key.
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Withings Nokia Steel HR Heart Rate and Activity Tracking Watch, up to 25 Days Long-Lasting Battery Life, Swim Proof with Soft Silicone Interchangeable (Black) : : Sports, Fitness & Outdoors
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The world's first analog watch with clinically validated ECG - ScanWatch
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