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smartLAB HRM 5 Heart Rate Monitor Chest Strap Non-Coded 5.3 kHz Heart Rate Monitor Suitable for Your Exercise Bike No Bluetooth and ANT+ with Elastic Fabric Strap : Amazon.de: Sports & Outdoors
Chest Strap Heart Rate Monitor (CL800) Bluetooth & Ant+
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Powr Labs Bluetooth Heart Rate Monitor Chest Strap, Heart Rate Monitor with Ches | eBay
Magene H64 Heart Rate Monitor Chest Strap HRM Fitness Tracker IP67 Waterproof Support Bluetooth 4.2 and ANT+ New Vesion : Amazon.de: Sports & Outdoors