Meet the Polar M430, a $230 running watch 'built for accuracy'
Polar Vantage M2 | Polar USA
Polar M430 | Running watch with GPS tracker and pace | Polar USA
Polar Vantage V and M Introduction: 14 Sensors Polar to Measure Wrist HR in the V & M, Running Power and Muscle Load Metrics in the V, Battery Life up to 40 hours - Road Trail Run
Amazon.com : POLAR VANTAGE V – Premium GPS Multisport Watch for Multisport & Triathlon Training (Heart Rate Monitor, Running Power, Waterproof), Standard Edition, White : Sports & Outdoors