... Air purifier with ozone and HEPAPurifierHepa Air PurifierHome Air PurifierOzone,Ion/Negative Ion,HepaFunction1) Clean the indoor air thoroughly, adhesive dust, particle ... ) Increase inner room oxygen content and generate healthy negative ion to improve the indoor air quality purifier Features:Adopts the ... oxygen device, with high level, mid-level and low level wind, timing can be set 1 hour, 2 hours,4 ...