The PEMF-120 is a high intensity impulse system popular with practitioners, and is most often used in a clinical setting.
This unit has a single program, with impulse rate (pulses per second) dependent on the intensity level chosen. The higher the intensity, the slower the pulse rate will be. At the lowest intensity, pulse rate is close to 50 pulses per second and at the highest intensity pulse rate is slower than one pulse per second.
The maximum intensity of the system is 9,400 gauss (or 940,000 microTesla). Most people will not use the system at that level. Even at half-power, this unit is capable of producing muscle contractions in the user.
Treatment time depends entirely on the user and condition being treated. The newest model of the PEMF-120 has an adjustable timer that can be set for between 1 and 10 minutes.