Enhance your cycling performance using the Polar CS Cadence W.I.N.D Sensor which accurately measures your pedalling rate in real-time; review your results to see your improvements. Team with compatible Polar cycling units to stay on top of your training. Go Further The lightweight and aerodynamic Polar CS Cadence W.I.N.D Sensor helps you improve your cycling technique and identifies your optimal cadence. Rely on its accurate measurements of your pedalling rate as revolutions per minute (RPM) in both real time and average time. Designed for use with the following Polar products: RCX3+5, RS800CX and C500+600.* * Please note: The Polar RCX3+5, RS800CX and C500+600 products are sold separately.