Stores Heart Rate Underwater and Forwards Data Specifically designed for swimmers Non-slip strap Stores and forwards heart rate data to compatible devices¹ Take your training to the next level by pairing HRM-Swim with your Forerunner® 920XT. Specifically designed for use in the pool, the sleek, non-slip strap stays in place, even during wall push-offs. Once you're out of the water, including when the torso is lifted out of the water mid-session, real-time heart rate, interval summaries and stored heart rate are transmitted to the 920XT. Example of Typical Uses HRM-Tri HRM-Swim Bike rides, runs, bricks Pool swims Open water swims Open water swims Triathlon competition (open water swim) Triathlon competition (pool swim), triathlon kit not required Triathlon competition (with pool swim) while wearing triathlon kit Runs or bike rides as part of a multi-sport activity that includes a pool swim