Working Principle Applying microcrystalline magnetic vibration technology, the microcrystalline magnetic vibration energy is transmitted to the cells of the whole body through the sole electrode plate to generate polarized heat. The positive and negative ions in the body move violently, and perform deep physical therapy on human body functions from the inside out. Microcrystalline magnetic vibration energy is similar to the energy of the human body, thus helping to heat up the deep parts of the human body. It is continuously introduced from the deep meridians of the soles of the feet to resolve blockages, dredge qi and blood, and improve immunity.   Cautious (1) Do not cover the product with quilts or other items to prevent local overheating. If the temperature is too high, lower the temperature immediately to prevent burning. (2) Do not pull hard at the connection between the power cord and the controller, and avoid bending the controller power cord. (3) Do not use needles or metal objects to fix the product to prevent damage to the instrument. (4) Do not use it in an oxygen breathing chamber or when using oxygen breathing equipment. (5) Do not use it while sleeping, and turn off the power when not in use.