The bkool speed and cadence sensor is another level in training and allows you to focus a lot more on the style of riding compared to choosing the wrong gear and spinning the wrong cadence this part can be used in conjunction with the bkool one so that the rider can use bkools bsim software like with the pro trainer the cadence sensor attaches to the chain stay on any bike using plastic zip ties for a firm and secure grip the ant wireless technology makes for a quick and simple set up and a