A pro’s cycling system. For the professional cyclist and also for you who want to ride with the best of the best. CS600 with the Power Output Sensor W.I.N.D. is the most complete cycling system on the market for serious performance oriented riders and their coaches for planning, monitoring and analysing the training. With CS600’s cycling efficiency feature you can improve your cycling economy to succeed in those long and exhausting races. Key features: • Wireless W.I.N.D speed sensor • WearLink® transmitter W.I.N.D. • Optional W.I.N.D. wireless cadence and Power Output sensors • Cycling efficiency (option with Power) • Energy output • Cycling limits • Incline measurement • Polar sport zones • SportZoneLock • Training planning with Polar ProTrainer 5TM • 99 memory files • ECG accurate heart rate with zones (% max)