Polar CS200-T31C Special Edition Cycling Computer Heart Rate Monitor with T31C Transmitter Affordable handlebar-mounted cycling computer with included heart rate monitor Includes T31 chest strap coded transmitter, prevents cross-talk from other electrical devices Cycling Economy/Intensity enables you to predict your calorie expenditure Wireless cycling measurements: speed (current, average and max); trip; distance Wheel size settings for two bicycles, speed sensor installation for different fork shapes