Garmin HRM Dual connects to Garmin/Bluetooth/ANT+ devices - 010-12883-00
Garmin HRM-Dual | ANT+® and Bluetooth® Heart Rate Monitor
Garmin HRM-Dual - Premium Heart Rate Monitor Chest Strap, Real Time Heart Rate Data via Bluetooth Low Energy, ANT+, Black : Amazon.co.uk: Sports & Outdoors
Heart Rate Monitor Strap for Garmin, Apple, Android, ANT+ & Bluetooth 4.0 (XS-S) | eBay