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25 OFF for Huawei Band 2 Pro
Huawei Band 2 Pro, one of the best fitness bracelets, has a 25% discount on

Huawei Band 2 Pro has a 20-day autonomy, counts the steps, provides information about sleep quality and is one of the few bracelets that cost less than $100 and has GPS....
Read more > Category: Shopping > Hits: 4 > Date Added: 29-9-2018
How does fitness tracker measure heart rate
The blood is red, which means it reflects the red light and absorbs the light of another color (usually the fitness tracker uses green light).
When the heart beats, the blood flow is stronger and so more green light is absorbed. Analyzing the reflected light, it is possible to calculate the heart rate....
Read more > Category: Tutorials > Hits: 1 > Date Added: 9-10-2018
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