6 in1 professional peneelily hydro ultrasonic machine skin face oxygen water spa beauty equipment

the vacuum circuit is formed by vacuum negative pressure, which fully combines the ultra-fine bubbles and nutrient solution, and directly acts on the skin through the specially designed spiral suction tip,and can keep the ultra-fine bubbles in contact with the skin for a long time and promote the peeling effect. (negative pressure: lower than normal pressure, the use of negative pressure is very common. people often make a certain part of the space appear negative pressure, then they can use the ubiquitous atmospheric pressure to work for us. for example: when people breathe, when the lungs are in a state of expansion when there is negative pressure, a pressure difference between the inside and outside of the lungs is formed to press fresh air into the lungs.).syi