1. " 37KHZ ultrasonic frequency”,which is close to the treatment of professional salon , could clean the dirt that could not cleanse by basic face cleansing . Most ultrasonic frequency scrubbers are less than 30KHZ in the market. 2.The“+/- “ ion works with high frequency ultrasonic could adsorb and lead out dirt effectively, improve the skincare lotion and serum absorption. 3.The EMS function works with high frequency,which are suitable for people who have trouble with big pores and sagging skin. 4.IPX6 waterproof, it can be used in the bath. 5.4 working modes 1)Peeling mode Low/High level (37kHz + 2 poles ion care) 2) Moisturizing mode (37kHz + 2 poles ion care) 3)Tightening mode (37kHz + EMS) Unique 2 pores ion combined with ultrasonic,which have a spa-grade facial care,different from market simple ultrasonic with one pore ion technology. 6.This multifunctional device could use together with peeling cleanser,serums,lotions,creams,it is a versatile device to meet your daily skincare demand.