Electrical stimulation device for applying frequency and peak voltage having inverse relationship

A method of using a portable electrical stimulation device, comprising:

• placing a first electrode at a first location of a first user;
• placing a second electrode at a second location of a second user;
• selecting one of a plurality of levels for an electrical signal to be applied to the first and second electrodes via a wave generator, the wave generator configured to provide the electrical signal to the first user and the second user via the first and second electrodes, wherein each of the plurality of levels is defined by at least a frequency, a peak voltage, and a peak current, wherein the frequency and the peak voltage have a generally inverse relationship;
• and
• applying the electrical signal, with the wave generator, to the first and second electrodes while the second user is performing a massage on the first user, thereby forming an electrical path between the first and second electrodes via direct contact between the first and second users.