It also has a sleep mode setting that sounds more like white noise, so it can essentially act as a two-in-one sound machine and air purifier if you like soft background noise to catch some z’s. I keep the air purifier tucked far on the side of my living room, and it really does recognize changes in the air quality across the whole house. I’m pretty big on my home having a balanced, clean aroma (hence why I have this air purifier in addition to the Coway Airmega), so I like how quickly this appliance can help zap odors from the air.