Skin Cleansing Set - with 3 skin care modes - ultrasonic skin stimulator, cools to 10°C to reduce eye swelling, tired skin shutdown and blocked pores, alternating fine pulses of positive and and negative ions along with heating cleanses the skin and pores (37°C, 40°C) , 43°C), 4 programs (cleaning, emollient, cooling, car), Li-Ion batteries