This cool air fan is definitely not for sensitive contemporaries. Either one does not hear well or is loud humming. Fortunately costs the fan is not much so I can visit the developer of the fan the next China vacations and submit my suggestions. Size is acceptable but the smoothness and the volume but have a lot of room for improvement. Each of the 5 star here has awarded for this fan should contact his audiologist times. But there is the possibility to set up earplugs to drown out this annoying hum. Yes that would have the same manufacturer should mitliefern I would have awarded 1.5 stars.
