Lindam Deluxe Ultrasonic Humidifier No filters to replace Compact space saving design Variable moisture settings Includes a demineralisation cartridge The Lindam Deluxe Ultrasonic Humidifier uses ultrasonic technology, allowing you to control the moisture level in your babys room. The optional demineralisation cartridge (supplied), should be used in hard water areas to minimise limescale residue. The humidifier is easy to use, a contoured handle is seamlessly built into the slim water tank which is easy to fill straight from your tap. How does it work then? Water flows into the base, it then passes through the demineralisation cartridge, water is then atomised by ultrasonic sound waves and mist is propelled into the air! The Ultrasonic Humidifier includes variable moisture settings to choose from so that you have complete control over the moisture level output. The unit comes in a compact space saving design, there are no filters to replace for ease of use and convenience.