PFS, short for Pain Free System, is a technology that modifies the shape and waveform of electrical impulses emitted by an electrostimulator so that the user perceives them as more pleasant. Instead of sharp or stinging sensations that some programs can cause, PFS ensures a smoother and gentler feeling during stimulation. The goal is to increase comfort during the procedure, allowing the user to tolerate even higher current intensity for more effective results in strengthening, regeneration, or pain relief.