Choose between nine preset programs. Besides conventional high-frequency stimulation, low-frequency stimulation in bursts and modulated pulse-duration high frequency stimulation, the CEFAR Primo also features mixed-frequency stimulation. Mixed frequency stimulator activates both coarse and muscle based nerve fibres, which can make treatment more effective. The ablilty to set the frequencies separately for mixed-frequency stimulation ensures pleasant stimulation. Program 6 stimulates at 10 Hz, which has proven ideal for treating nausea. Program 7 is high-frequency stimulation with a short pulse duration, which is suitable for facial stimulation. Two of the programs have a preset timer.