New Take off Garmin Heart Rate Monitor no Strap HRM3 SS | eBay
Replacing the Battery on the Garmin Premium Heart Rate Monitor | Garmin Customer Support
STL file GARMIN HRM3-SS heart rate monitor battery cover 💜・3D printing model to download・Cults
Garmin HRM 3-SS will connect/pair with forerunner 35 but will not show heart rate (see picture) - Accessories & Sensors - Running/Multisport - Garmin Forums