Garmin HRM-Pro Plus - Premium Chest Strap for Recording Heart Rate and Running Efficiency Values such as Step Rate & Ground Contact Time, Treadmill, ANT+ & Bluetooth Technology, Black : Amazon.co.uk: Sports
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