This is a device that applies an electric current to the human body for the purpose of relieving muscle pain, etc. and basically generates a low-frequency signal of 1 to 1,000 [㎐].It has several built-in automatic mode programs, so you can automatically adjust the frequency and stimulation type in the set mode.Therefore, even first-time users can easily operate it with just a few button settings, and it can also be used in manual mode, so users can freely operate the frequency and stimulation type in the way they want.