CS200 but adds an advanced wireless cadence sensor (which measures your pedaling rate as RPM). Like the CS100 and CS200, it includes three new innovative Polar features: the Polar Cycling Coach (a Web-based coaching program and diary), estimated time of arrival (based on your speed), and automatic display scroll, which switches the information on the display according to your preferences. The CS200cad also adds a number of additional sophisticated functions, including memory of your last seven rides, downloading ride date to a PC via microphone, indication of whether you 're above or below your average speed, and the ability to predict your calorie expenditure. Features include:   Wireless ECG accurate heart rate with Polar OwnCode (5kHz) to prevent cross-talk from other heart rate monitors Target heart rate zones with visual and audible alarms Graphical comparison of heart rate and speed Heart rate measurements: maximum of total and each lap, average of total Wireless cycling measurements: Speed (current, average and max); trip; distance Calorie consumption rate per kilometer Wheel size settings for two bicycles, speed sensor installation for different fork shapes Automatic lap recording (up to 50 laps) with exercise date Exercise file info page with date and time Semi-automatic backlighting Water resistance to 10 meters (protects against rain and splashes) SpeedPointer: Points out the difference between average speed/pace and actual speed/pace on the display by up/down arrows. Estimated Time of Arrival: Set the distance you are going to ride, and your cycling computer calculates the estimated time of arrival based on your cycling speed. Polar OwnCal: Shows your energy expenditure during one exercise session as well as your accumulated kilocalories during several exercise sessions. Because the OwnCal tracks both the energy expenditure during one exercise session and the accumulated kilocalories during a longer time e.g. one week, it helps in achieving both short term and long term goals. Cycling Economy/Intensity: Enables you to foresee your calorie expenditure and secure sufficient intake on a long ride. This feature is also useful for comparing and analyzing the loads of various training types. Compatible with Polar T31 and Polar T61 coded transmitters  (less)