Purchased around 2020 and used about 5 times. It has been stored at home since then, but there are no visible scratches. Operation has been confirmed! From the official website ↓ This one device tackles roughness and dryness. A pore care facial device that supports PM2.5*. With approximately 90,000 ultrasonic vibrations per second and ion care, it removes roughness from pores. Also supports fine particle pollutants such as PM2.5. With YA-MAN's unique cup shape, it fits firmly on the T-zone and U-zone.