Amazon.com : POLAR Pacer Pro - Advanced GPS Sports Watch, Wrist Heart Rate Monitor, Smart Watch for Men and Women, Workout Running Watch, Training Program & Health Recovery Tools, Sleep Monitor &
Amazon.com: Polar Grit X Pro - GPS Multisport Smartwatch - Military Durability, Sapphire Glass, Wrist-based Heart Rate, Long Battery Life, Navigation - Ideal for Outdoor Sports, Trail Running, Hiking : Electronics
Amazon.com : Polar Vantage V Titan - Sports Watch with HRM H10 Chest Strap for Multisport and Triathlon Training with GPS, Heart Rate Monitor, Waterproof : Sports & Outdoors