The device sends a premixed modulated envelope of two high frequency electronic wave forms ("Feed Signal") between the two electrodes. The beat frequency of the modulated envelope ("d-Frequency") is equal to the difference in frequency of the two feed signals. The location of beat frequency formation is dependent on the size and location of the two electrodes. With the configuration used in the study, the beat frequency signal is believed to form immediately ventrally to the Return electrode. The size of the volume of tissue affected can be changed and is dependent upon electrode geometry and the amplitude of the Feed Signal. The beat frequency is a low frequency blocking signal which is believed to cause a demodulation in the nerve cells and a reduction of the sodium/potassium ion exchange. As a result, the charge polarity of the nerve cell wall is prevented from changing and is therefore unable to transmit pain impulses. The size of the volume of tissue affected can be changed and is dependent upon electrode geometry and the amplitude of the Feed Signal.