ETBELLA 3-Function Beauty Device NF-402 (Ultrasonic + Ion + High Frequency) Brand new, unused, and stored in its original box. ＜Ultrasonic Function＞: Skin care with ultrasonic micro-vibration! Approximately 1.1 million ultrasonic vibrations per second give the skin firmness and refine its texture. Two types of probes allow you to care for areas of concern. ＜Ion Introduction Function＞: Microcurrents from the three types of probe heads penetrate the beneficial ingredients of serums into the skin. ＜High Frequency Function＞: Ozone is generated by passing high-frequency current through the three glass tubes. This cares for skin problems by keeping the skin clean.