Abstract: A portable electrical stimulation device is disclosed. In one aspect, the device includes a pair of electrodes configured to be electrically coupled to a user and a wave generator configured to provide an electrical signal to the user via the pair of electrodes. The wave generator is further configured to generate the electrical signal at one of a plurality of levels. Each of the plurality of levels is defined by at least a frequency, a peak voltage, and a peak current. For each of the levels the frequency is in a range of about 50 Hz-about 500 Hz, the peak voltage is in a range of about 40 V-about 250 V, the peak current is in a range of about 25 mA-about 150 mA, and the frequency and the peak voltage have a generally inverse relationship.