Amazon.com: 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) : Everything
Amazon.com: POLAR Vantage V Sports Watch for Running, Cycling, Swimming, Etc. Precision Prime Sensor Fusion Technology Enabled, Waterproof, GPS Watch : Electronics