Review on YIOU Air Purifier for Large Rooms: H13 True HEPA Filter, 99.98% Allergen Removal, 547ft² Coverage, Ultra-Quiet - Ideal for Allergies & Pets, California Approved - Grey by Jennifer Verdugo

I am very glad that I bought this air purifier. It looks very well made. In addition to the power button, it has several buttons to control the fan intensity (from 1 to 3) and a timer (1 hour, 4 hours and 8 hours), as well as a night mode to reduce the intensity of the button illumination. It also has an automatic mode where it detects the air quality and changes the fan speed depending on the air quality. As you can see, it has a large filter that you can change with a button, and it includes a power adapter that plugs into the back of the unit.