Heart Rate Monitor Ring Type

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Description:Heart Rate Monitor Ring Type (Item No. ID-501) 3-in-1 Functions : Heart rate monitor, Stopwatch and Clock 1.Continuous heart rate display from 30~250 bpm 2.Max/Min heart rate training zone with alert 3.10 hours count-up timer 4.Auto-shut off after 1 minute. 5.Battery 1 X CR2032 can be easily changed youself