Maxwells Law, one of the most basic rules of physics is that when electricity flows, a flowing magnetic field is created, and conversely, when a magnetic field is flowing an electrical flow is created.
A PEMF device drives electricity through copper coils at specific waveforms and frequencies, which the principles of Maxwell’s Law, produce a pulsing magnetic field, which, induces electrical flow in the cells that are in proximity to the field, that is, the person using the device.