I don't know if that is the number. I had to contact the support via mail because in the RMA I received after phone contact they wrote HRM premium strap without sensor. Well, I need a new HRM Run. They wrote in the description that mine doesn't work anymore but selected a wrong product number. The HRM-Pro™ series accessory calculates your running pace and distance based on your user profile and the motion measured by the sensor on every stride. The heart rate monitor provides running pace and distance when GPS is not available, such as during treadmill running. You can view your running pace and distance on your compatible Venu® 2 Worked perfect with fenix 5 and now with Forerunner 965. " Polar OH1+ is an optical heart rate monitor that combines versatility, comfort and simplicity. You can use it both as a standalone device and pair it with various fitness apps, sports watches and smart watches, thanks to Bluetooth® and ANT+ connectivity. ". I've had similar experiences with my FR 45. After using it for mobths, HR reading started jumping high during excercises, way above my HR max. I contacted Garmin support and tried everything they suggested, including factory reset. They finally sent me a chest strap to test with, which worked fine. Hi everyone, Title is wrong 😂 just stopped working. Did a Wattbike workout this morning with HRM working fine, connecting to both Wattbike and Fenix 7X. Came to my evening workout and it just wouldn’t connect. Tried restarting watch, forgetting the HRM on the watch and trying to search again. Now the watch can’t find the HRM anymore. If a smartphone, Garmin computer or Garmin watch are out of range, the HRM-Pro saves the workout. Though swimming is highlighted as the perfect scenario, Garmin has mentioned other sports such as ice hockey can benefit from a heart rate monitor. Further, Garmin states the HRM-Pro captures running data to improve form through several metrics. Garmin Smartwatch Wearables Gadgets Construction technology Technology. 9 comments. Best. Add a Comment. EditingAllowed • Forerunner • 9 mo. ago. – HRM-PRO Plus has new tool-less battery door design. – HRM-PRO Plus has white pod, while HRM-PRO has a yellow pod. BrotherNB • 9 mo. ago. Thanks for the reply. if the HRM-Pro and HRM-Run use the same O-ring design as the HRM-Tri, that is why the factory o-ring immediately starts to deform and fail to seal after the first battery change in the HRM-Tri so tiny amounts of moisture get into the electronics and that is the end of that, it causes a non-stop low level short circuit or constant battery drain DkTj.