This sport watch gives you several functions to keep track of different key metrics during the workout. The model comes equipped with a sleep tracker.
From Amazon
Polar Vantage M - Advanced GPS HRM Sports Watch for Men and Women - Running and Multisport Training with Wrist-based Heart Rate Monitor (Waterproof, Lightweight Design & Latest Technology)
Polar
Polar Vantage M, Multisport watch, Black
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