Pureair 200 True HEPA and PCO air purifier with sensorPowerful 5-layer air purification system: Pre-filter + Activated carbon + True HEPA + PCO photo-catalyst + Negative ion Four-grade airflow adjustable: high, middle, low and energy-saving mode Filter replacement indicator Remote control operation 3 timer setting for shut-down: 2h, 4h, 8h Different LED light indicates different pollution level Speed adjusts automatically according to air pollution level under auto mode High efficiency performance: Removing formaldehyde 95%; removing ammonia 97%; Removing benzene 96.6%; removing TVOC 95% Sterilization: 99%; removing particulate: 99.99%Technical Data:Product size(inch/mm) 13.3x17.71x6.30/340x450x160Weight lbs/kg 11.90/5.4Rated Voltage 100-120V/60Hz 220-240V/50HzAir delivery rate(cfm. m3/h)High speed: 105.9/180Middle speed: 76.52/130Low speed: 47.09/80Energy-saving: 35.31/60Noise Level <52dbNegative ions 3 million/ccRatedPower 40WCoverage area376 sq. ft /35m2Fan speed4 speed adjustableAir Pollution IndicationGreen light: Fresh airOrange light: Slight pollutionRed light: Heavy pollution