Description: Dual function (sterilizatoin+dehydration), 99.9% sterilization in 10 mins, Discharging of moisture by ventilating fan, Korean-made UV-C LED, Hygienic solution for daily used mask Features: features World's first mask sterilizer MS-01 has dual functions. UVC LED helps sterilizing and ventilating fan helps the mask to discharge of the moisture from the breath.