this was tested on HRM Tri, HRM Swim, HRM run, HRM Pro, and HRM-Pro Plus, by Garmin, it works, and the HRM Swim and Tri were tested for over 150 hours in the pool and open water swims, no leaks were found.
Silicon O-ring that replaces the one installed in the Garmin Heart Rate Monitors HRM Tri, HRM Swim, HRM Run, and HRM Pro.
You'll risk losing the HRM if the Oring is not replaced.
This is applicable to the 2015-2022 style, HRM Tri, HRM Swim, HRM Run, HRM-Pro and HRM-Pro Plus.
Please let me know if you have any questions before making the purchase, i'm not making much money on this listing, it's mainly so that the customer wont have to buy another HRM after the battery replacement (which happens in the majority of cases when replacing the battery but not the O-ring)...