The PEF's were directed to the wrist. The model used has the form of a bracelet called Quantum MH-2MR which uses, as source of power, an alkaline battery of 1.5 volts connected to an electronic circuit formed by two hybrid circuits of magnetic oscillation and a control system of all the generating frequency system. The power of the variable magnetic field generated by the equipment varied from 0.64 to 1.4 Gaussian, whereas the spectrum generated by the main fixed frequencies went from 0 to 240 Hertz, the semi-fixed one went from 241 to 360 Hertz and the random one went from 361 to 170 Megahertz. The control system continuously ordered the fixed generation of magnetic signals with a frequency that differed in 0.1 Hertz to each other in the region of the spectrum between 0 and 240 Hertz. It also ordered the semi-fixed generation (a fixed and a random portion) of frequencies between 241 and 360 Hertz, as well as the random generation (only when the external presence of these frequencies was detected) of a frequency between 261 and 170 MHz.