Air Purifier with Sleep Mode for Home Office up to 1300 Sq Ft3 stage purification includes a pre filter H13 HEPA filter and activated carbon filter Large purification area reaches up to 1300 sq. ft per hour Effectively removes 99. 99% of particles as small as 0. 1 microns Smart touch panel and 4 adjustable fan speeds for easy operation 3 color air quality indicator lets you know the current air quality in time The 2 4 6 8H timer allows you to set the auto shut off time freely Child lock function prevents kids