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Amazon.com: CooSpo GPS Bike Computer Bluetooth ANT+ Wireless Cycling Computer Bicycle Speedometer with CooSpo Bike Cadence/Speed Sensor Cycling Bluetooth ANT+ RPM Cadence Sensor : Electronics
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Amazon.com : iGPSPORT C61 Cadence Sensor ANT+ and Bluetooth Wireless for Cycling Computer Sport Watch Mobilephone : Sports & Outdoors
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