GARMIN ANT+ HEART RATE MONITOR SPORT TRANSMITTER HRM MODULE HRM3-SS NO STRAP | eBay
Used Garmin HRM 3-ss including strap, Sports Equipment, Other Sports Equipment and Supplies on Carousell
Garmin HRM 3-SS will connect/pair with forerunner 35 but will not show heart rate (see picture) - Accessories & Sensors - Running/Multisport - Garmin Forums