Cycling Computer & Optional Heart Rate Monitor   BRAND NEW In the Box, 2010 Model    2 year International warranty!   This is exactly the same as a CS100 except this 'b' version comes without the Heart Rate strap. Perfect for anyone who already has a Polar Heart Rate strap from anonther polar product.   Polar CS100 Cycling Computer with Transmitter - Black with Grey Buttons: The Polar CS100 cycling computer is for all cyclists - beginners or the seasoned rider who want results. It displays and records your data during exercise including speed, distance, heart rate and expended calories and even gives you an estimated arrival time based on your cycling speed. Just attach the computer to the included bike mount, secure the mount to your handle bars and off you go! How Does it Work? The wireless Polar Speed Sensor measures your speed and distance, when the optional Heart Rate Transmitter/Strap is added the Polar Coded Transmitter sends your heart rate signal to the cycling computer. The electrode areas on the back of the transmitter detect your heart rate. With the Target Zone Alarm you can ensure you exercise at the right intensity. When the target zone heart rate limits are activated, the Polar cycling computer sounds an alarm if you are above or below your heart rate limits. With all of these outstanding features and at our unbeatable price, you can't go past the Polar CS100b cycling computer. General Features Automatic/Manual target zone   (optional with HRM strap) Backlight Dome button with touch response and sound Double antenna (longer range, less disturbance) Easy start (setting wizard) Over-sized display Sound volume level setting User configurable displays Visual and audible alarm in target zones Water resistant - 10m Dimensions: (H) 6cm (W) 4.7cm (D) 1.5cm Accessories: Polar bike mount, Polar speed sensor. Colour: Black with grey buttons Cycling Features Automatic display scroll Auto start/stop Bike mount Cadence (when optional sensor is added) Calorie consumption rate/hour Calorie consumption rate/km Distance Estimated Time of Arrival Graphical comparison of two values Multifunctional handle bar/stem installation Odometer (1/2 and total) Speed (current, average and max) Speed sensor - wireless Speed Pointer Wheel size settings for two bicycles Recording Features Average heart rate Calorie expenditure (Exercise/Weekly/Total/Fat%) - exe.total Distance (total) Exercise Time (total) Exercise file info page with date and time Number of exercise files (with summaries) Short diary Target zone limits Time in target zone Dont Forget; Heart Rate funtions are optional and will only work when the Polar Heart Rate Strap and Transmitter are added. If you want the strap, look at our CS100 product which includes this Heart Rate Strap and Transmitter .