Specifically designed for triathletes, the Garmin HRM-Tri is their smallest and lightest heart rate monitor, which fits within the width of the strap. The HRM-Tri stores heart rate data when underwater, then forwards it to your wearable at the end of your swim. When running, this pairing allows your compatible wearable to report 6 running dynamics metrics: cadence, stride length, ground contact time, ground contact time balance, vertical oscillation and vertical ratio.Features: Easily adjustable strap Soft, rounded edges and covered seams to provide comfort Stores and forwards heart rate data to Forerunner® 920XT Typically used for bike rides, runs, triathlon (open water swimming) and triathlon (pool swim) while wearing triathlon kit

No more sifting through the contents of a sports bag or backpack looking for your heart rate monitor or training watch. This zipped case holds your Swim, Edge or Forerunner along with accessories, such as the heart rate monitor strap, charging cradle and USB cable. Featuring a mesh top for ventilation and an end loop for attachment options, it's also great for keeping your training gadgets together when you travel.