Meet the Polar A370 tracker: a waterproof wearable device that provides you with 24/7 continuous heart rate monitoring and sleep tracking. Polar A370 tracks how many calories you have burned. It also helps you better understand your sleep. The device uses your phone’s GPS signal to track your pace and map out your route.
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You can use the device to check smartphone notifications. It alerts you if you have been inactive for too long. Costs under $180 at this time.
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