จัดส่งฟรี! เมื่อสั่งซื้อเครื่องกรองอากาศทุกรุ่น Adjustability: We Only picked air purifiers with at the very least a few adjustable speed ranges. Air purifiers could be loud at their greatest speed — acquiring reduce, quieter speed choices, particularly in bedrooms, is very important, dependant on individual practical experience. CADR (clear air shipping and delivery Successfully Submitted (Awaiting Approval)