The heart rate detection function is really useful.

The heart rate detection function is really useful.
Because I have a premature heart beat, the GTR Mini provides accurate, real-time heart rate data. The results are clearly displayed on the watch face and can be synchronized with the accompanying application. When my heart rate is sending out special conditions, the watch will alert me and let me pay attention to my heart rate, which is very useful.

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I highly recommend this navi r3 !!!

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