This is a brand new, unused item that has never been taken out of the box (*^^*) Also, there are no smokers or pets in my home. It seems to be a compact and popular product (*^_^*) How about it for winter infectious disease prevention? This air purifier is equipped with a high-performance HEPA filter, achieving an air purification rate of approximately 92.1%. - Brand: sumuu - Model Number: H158 MBMG - Size: Diameter 178mm, Height 280mm - Weight: 2kg - Power Supply: AC 100V 50/60Hz - Power Consumption: 24W - Functions: 4-stage air volume, timer function, sleep mode, light function - Air Purification Capacity: Uses HEPA filter, air purification rate of approximately 92.1% Thank you for viewing.