Polar Vantage
Polar Vantage
Precision Prime sensor fusion technology
9 optical LEDs in two colors (4 red and 5 green) as well as four bio-impedance sensors that detect when there's good skin contact for taking the heart rate readings.
https://www.youtube.com/watch?v=w0w5T2_Gb64
https://www.polar.com/hk-en/vantage
Polar Vantage V
https://www.polar.com/en/vantage/v
Polar Vantage M
https://www.polar.com/en/vantage/m
https://www.polar.com/en/products/compare?product1=91059&product2=91092
https://www.polar.com/blog/polar-vantage-series-next-generation-multisport-watches/
SONY CXD5603GF
Power consumption @ continuous tracking : 6 mW
https://www.sony-semicon.co.jp/products_en/gps/index.html 多謝分享資訊
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