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POLAR OH1 + Waterproof Optical Heart Rate Sensor with Swimming Goggle Strap Clip and Armband – HR Monitor with Bluetooth, ANT +, Black, Medium/XX-Large, (92074855) : Amazon.com.au: Sports, Fitness & Outdoors
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Bluetooth ANT+ Arm Band Heart Rate Monitor with Chest Strap's Accuracy, Compatible with Peloton Wahoo Garmin Polar and > 200 Other Apps, Rechargeable, Ip67 Water Resistant with Optical sensors : Amazon.com.au: Sports,
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POLAR H9 Heart Rate Sensor – ANT + / Bluetooth - Waterproof HR Monitor with Soft Chest Strap for Gym, Cycling, Running, Outdoor Sports, Black, X-XS (92081566) : Amazon.com.au: Sports, Fitness & Outdoors
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