Comply with most of devices which support ANT+ wireless. Garmin M/N: HRM-RUN. Garmin HRM-RUN sensor 1(Soft strap NOT included).
Garmin HRM-Run - buy at digitec
Replacement Sensor module for Original Garmin HRM-RUN ANT+ Heart
Support: Changing the battery on a Garmin Heart Rate Monitor
REPLACEMENT SENSOR MODULE for Original Garmin HRM-RUN ANT+ Heart
Garmin HRM-Run - buy at Galaxus
HRM Soft Strap Universal Replacement for Mo-Fit, Most Garmin
Garmin HRM Tri Heart Rate Monitor HRM Run 4.0 Heart Rate
Garmin Dual Heart Rate Transmitter Bluetooth & ANT
Bontrager ANT+/BLE Softstrap Heart Rate Belt - Trek Bikes
Garmin HRM-DUAL Heart Rate Strap In-Depth Review
Everything you ever wanted to know about the Garmin HRM-RUN