Works great! Very easy to connect with my phone, tried it with Adidas Running and Strava apps, both connected easily. Hrart rates were the same as my Samsung Galaxy Watch 3 most of the time during a run, with some moments of 2 or 3 points differences, so I would guess the calibration of both is good. Delivery was fast. This is my 2nd of this brand (I lost my first one 2 years ago). Thank you!

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todo correcto

The product arrived fast, already tested with some android applications and seems to give accurate heart rate. The only problem is that I wasn't able to make it work with the application "Adidas Running"....