See here is the cool part, the control pad... First off, the beads have eight different speeds to choose from and three different pulses to choose from, slow, normal and fast... How cool is that? At the top of the control pad there are two buttons, one is the on/off button, the other has an F for functions. The function button allows you to choose from the three different settings, slow, normal and fast. Under those two buttons there are up and down arrows, each to control the speed of rotation and the other vibration. Here you have eight different speeds to choose from. Also, if you put both settings up to the highest, they both still work quite powerfully... No wonder why you need 4 AA batteries. By the way, those are not included... The only problem I would say is that the indicator light is extremely bright.... My husband was shocked at how bright that little light is. I've got my own under the covers red flashlight.