ZycBeautiful for Garmin HRM-SS Heart Rate Monitor Run Heart Rate Swimming Running Cycling Edge 305 500 520 705 735XT 1000 Fenix3 _ - AliExpress Mobile
ZycBeautiful for Garmin HRM3-SS Heart Rate Monitor Run Heart Rate for Garmin Forerunner 10 15 220 620 735XT 1000 Fenix2 Fenix3 _ - AliExpress Mobile
Garmin HRM 3-SS will connect/pair with forerunner 35 but will not show heart rate (see picture) - Accessories & Sensors - Running/Multisport - Garmin Forums
Battery Replacement Instructions for Premium Feature HRM Straps | Garmin Customer Support