Polar Vantage V3
This sport watch has a generous battery life of 140 hours. The model is waterproof and works just as well in rainy weather.
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From Amazon
Polar Vantage V3, Sport Watch with GPS, Advanced Heart Rate Monitor, and Extended Battery Life, Smart watch for men and women, Offline Maps, Running Watch, Triathlon Watch
£384.00
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This product is also available at 2 unverified stores.