The principle of operation: vacuum is created by sucking air with a special pump after applying the cup to the skin, and the valve located at the end of each of them maintains this state inside them. During the procedure, the magnet tip compresses and stimulates the acupuncture points with a magnetic field.
Vacuum cups (fireless) are gaining more and more popularity due to the convenience of placing them (thanks to the cup tube you can put without the help of another person even on your back) and safety (no possibility of burning as with glass cups).