The interferential electric therapy device delivers two or three groups of intermediate-frequency currents into the human body in a cross-connected manner. In the deep tissues, it generates low-frequency modulated currents ranging from 0 to 100 Hz. This interferential electric field can penetrate through the tissue barrier and stimulate nerves and muscles to achieve therapeutic effects such as pain relief, anti-inflammation, improvement of blood circulation, and promotion of tissue repair. It is widely used in clinical settings for treating conditions like nerve disorders, muscle spasms, arthritis, sports injuries, and chronic pain, featuring non-invasive safety and multiple mode options.