... with top quality UV bulb air sterilizer 3. Auto work time controller 4.perfect after-sale service Mobile air sterilizerProduct code: ZW30ET1Rated wattage ... : >110μw/cm2 squareBulb life time: 8000 hours The movable air sterilizer is a necessary for hospital, public office, school, restaurant, and ... 30 square meter office, usually 20-30 minutes is enough. air sterilizer