For those of you that are having problems where the computer is slow to pick up the speed and or cadence, have you tried to increase the sending unit power? Not sure if this is still an option, but with the older speed/cadence sensors, there is a switch inside that allows you to adjust the "distance" (power) that the sensor sends its information with. If the computer is slow to pick up, it may just be that the "sending power" may need to be tweaked a little. Hope this helps some of you.