The tested model is a manual control at two speeds. The humidifier is very compact and easy to use. The reservoir of 2 liters of water allows to humidify the room overnight. It is very quiet at low speed but it is a little less top speed. During use no water trace appears, technology "nanocloud" developed by PHILIPS is effective. We quickly realized the benefits of this device in our room to the ordinary air too dry, we had a humidifier on the radiator but this was much less effective and above could be used in times of opposed heated to the humidifier that can act throughout the year. Thanks to this device the nose are not dry on waking, breathing and sleep are so much better! I recommend this humidifier that provides a real benefit and I sincerely believe that it is useful for everyone, seniors, baby, asthmatic child, people with respiratory problems etc ..