... ,absorf benzene,formaldehyde,ammonia and other harmful gases 2.subside smoke air purification used in chilidren or kids roomA. ... eliminate all harmful gases indoors and in public area, such as benzene,formaldehyde,ammonia and TVOC,up-to-standard rate ... eliminate smoke odor and prevent smoking harm5.mildew and moth proof6.refresh the air,refresh mind,balance internal recycling and improve environment ...