Cheaper chest strap comes with more ways to pair

Polar has launched its new H9 heart rate chest strap, for those stepping up their training for in 2020.

The Polar H9 joins the existing H10 and OH1+, offering ANT+, Bluetooth and 5KHz connectivity, so it will pair to pretty much all running watches, phones and even smartwatches. The Polar H9 is $59.99, so it undercuts the $89.99 Polar H10 chest strap nicely.
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https://www.wareable.com/sport/polar-launches-h9-chest-strap-7882