1, the stimulation effect of space: in three-dimensional space are stimulating effect; 2、Multi-site stimulation effect: within the range defended by the electrode, the distribution of electric field strength in the interference field can produce multiple stimulation sites; 3, enhanced kinetic effect: due to the mid-frequency current attached to a low-frequency intensity changes, and thus produce kinetic effect; 4, the dynamic change of the stimulation site: the low-frequency frequency of the endogenous current under the control of the computer will undergo some changes in the distribution of its electric field also will change accordingly, so the stimulation site will also change. Six prescriptions are stored in the computer chip, displayed on the panel and can be selected by scrolling. Within 30 minutes of each prescription, there are 12 variations in frequency and output current. Within 30 minutes of treatment for each prescription, there are 12 variations in frequency and output current, for a total of 72 variations across the six prescriptions. The transition between treatments is designed to be gentle and easy for the patient to accept. The transitions between modalities are designed to be gentle and easy for the patient to accept. The electrotherapy device utilizes interferential currents to promote local blood circulation, relieve pain, and provide treatment for neuromuscular tissues, arthritis, neuralgia, and other diseases. It can be used for neuromuscular tissues, arthritis, neuralgia, sprains, gastroptosis and other diseases, and has an auxiliary therapeutic effect.