Introducing the YD-700B High Efficient Indoor Air Sterilizer, the best and most advanced air purifier on the market. Unlike other air purifiers which have only 1 or 2 mechanisms of reducing pollution, the YD-700B has 4 mechanisms which help to destroy pollution. This 4-mechanism system helps destroy not only pollution from the air, but also helps destroy pollution embedded in walls, ceilings, floors, carpets, furniture, clothing, and on counter tops and other surfaces. It sanitizes everything in the house and reduces all odors, including cigarette smoke, mildew, cooking odors, and any other odors in your home. The super advanced fan of the YD-700B runs so quiet that you would have to put your ear up next to it to know that its even running. And the YD-700B is virtually maintenance free and requires no filter replacement. There is a small 4 inch by 8 inch pre-filter made of highly durable mesh that you simply clean periodically by running water over it. The YD-700B is ideal for any room in your home where airborne and surface pollution may be present. SPECIFICATIONS ModelHigh Efficient Indoor Air Sterilizer YD-700B Max 03300 mg/hr+ (Away Mode)TechnologyNeedlepoint ionizationRF pulse ionizationOzone generation technologyPhotocatalyst technology LED display control panelActivated carbon filtration Adjustable timer setting Away modePower UsageOptional Power supply: 110V/60Hz or 220V/50Hz as customer requirementLint Screens & FiltersLED display control panelPhotocatalyst filterActivated carbon filterCoverageUp to 2,500 ft2Ozone Density<0.05mg/m3 (occupied condition), 1.2mg/m3 (unoccupied)Ion generation2million/cubic cmPower consumption40WSize9 wide x 12.4 high x 8 deepWeight16 lbs