The handlebar-mounted Polar CS100 combines all the features of a high-end cycle computer with a fully functional heart rate monitor--the Polar T31 coded transmitter. (The similarly featured CS100B offers heart rate monitor compatibility, but does not come with a monitor.) The CS100 provides a full range of cycling computer functions, and adds three new features to Polar's arsenal: 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. Features include: