Item # 9I-SDS920. Two machines in one unit.This portable machine is A valuable combination of 2 functions. Vacuum Function - First, the vacuum function removes surface sebaceous debris and aids in the cleansing process. Then, the sprayer allows you to lightly shower the skin with lotions or moisturizers. High Frequency Ultrasonic - It is an amazing way to invigorate circulation by stimulating cells and tiny facial muscles under the skin. The high-frequency waves have an anti-bacterial action which can be especially helpful for skin problems like acne.