ALROCKET air purifier with HEPA Filter remove 99.9% smoke dust allergies odors for 300 sq.ft Effective & Fresh Air Filtration:ALROCKET air purifier for home is equipped with 3-stage HEPA filter and aromatherapy pad providing a healthy pleasant aroma for you and your family.High Circulation Rate:air purifier for bedroom with advanced air spiral technology and 360-degree inlets it refreshes the air per hour in spaces up to 300 sq ft/28 sq m You can place the air cleaner on the office table study desk bedroom nightstand coffee table or any other place you like.