There are two speed setting options available. You can select the low speed or the high speed setting by pressing the on/off button or by sliding the speed setting slide up.
If you press the on/off button once, Philips Satinelle starts on a high speed setting (setting II). If you press on/off again, the speed setting changes to a low speed (setting I). When you press on/off button the third time, your Philips Satinelle switches off.