 This is the MegaWise air purifier, low noise level, smart auto mode, three stage filter system. It's got a HEPA filter. It's got settings, you can set it for one hour, two hours, four hours, or eight hours, or continuous. It's pretty quiet. You can't really hear it on the video. You can hear it when you're right there, but it's pretty quiet. There it is. That's high speed. You filter this with some screws and locks in, filters in there. Easy to change. There's a light to let you know when the filter is dirty. Usually it says about 90 days and it just snaps back in. And the lights on the bottom indicate the air quality. It goes from green to red.