It's an intermediate frequency. Intermediate frequency therapeutic instrument is a simulation of acupuncture in traditional Chinese medicine, which uses pulse current controlled by CPU to dredge blood vessels and nerves and achieve smooth communication. The low-frequency therapeutic instrument is to stick the electrode to the painful part and input low-frequency current to act on the painful nerve, thus affecting the body's function of transmitting pain, so it is difficult for the brain to receive the pain information transmitted by the nerve.