The HUMI cold humidifier nebulises cold water by utilising a high frequency that is imperceptible to the human ear. In fact it is such a high frequency as to be imperceptible to pets as well. This Cold Humidifier is perfect for a childrens room. This humidifier operates silently and can thus be used without disturbing children. This humidifier sports a very compact design that makes it ideal for even the tightest of spaces such as a side table or a small shelf. A humidifier is necessary since it helps the human body''s nasal and mucous tracts perform optimally. This helps children battle harmful bacteria and dust more effectively.Measurment:Length: 5.51Width: 4.13Height: 5.91