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Polar H6 | Bluetooth Smart Heart Rate Sensor Set – Zsig
TP3 Bluetooth Smart Heart Rate Monitor | ukwebsite-onlineshop
SportPlus Bluetooth 4.0 Chest Strap Heart Rate Monitor for iOS (From 7.1), Android (from 4.3) and Windows Phone, Optional with ANT+ And 5.3 Khz : Amazon.co.uk: Sports & Outdoors