Garmin Forerunner 735XT, new triathlon watch with optical pulse sensor - Correr una Maratón - Review of Garmin, Polar, Suunto, COROS...
Amazon.com : Polar Verity Sense - Optical Heart Rate Monitor Armband for Sport - ANT+ and Dual Bluetooth HRM - Waterproof HR Sensor with only One Button - Compatible with Peloton, Zwift