Garmin HRM-Swim heart rate transmitter for 920XT and fenix 3

The Garmin Swim Heart Rate Transmitter has the same features as HRM-Tri, however it has a special non slip material, keeping the monitor in place, during push-offs from pool walls or dives. It's never been possible to record heart rate accurately during swimming, until now with the Swim Heart Rate strap. Once on, the belt is comfortable due to its seamless material and rounded edges. The replaceable batteries (x2 CR2032) will last up to 18 months if you are using the belt for 3 hours a week. 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 your 920XT or Fenix 3 watch.