Nothing RPM is cadence. I just got one of these for Christmas and while out on a ride I didn't have it in AT mode and I was trying to get cadance up on the big readout, well little did I know but in manual mode the same button that switches the speed and cadence on the large display in AT mode stops the unit from taking measurements. As I continue to look down at my computer I finally realize that I am not going anywhere (miles have been stopped for some time). For the price I guess it includes good functions but I wish it was a bit clearer and had avg and max cadence numbers. I guess I just want more computer, but this will do for now.