This machine is microcurrent beauty machine, for face lifting and skin tightening. Few customers may feel the electricity is too strong for him, it should be his / her skin very sensitive for the micrcurrent. Please check the video test, the max electricity not over 15μA, (as we know 1A=1000mA、1mA=1000μA)。 For human safety electricty, it must be under 10mA, this machines out put is only 0.015mA. So this product is microcurrency.