The low-noise ultrasonic mist humidifier uses rapid oscillation to turn water into a fine mist that visibly exits the device through a fan and then evaporates. This process humidifies the air. The replaceable scale filter cartridges minimise the emission of undesired mineral and limescale deposits. The optional STYLIES Clean Cube minimises the development of bacteria and germs. Ultrasonic mist humidifiers are suitable for living rooms and bedrooms for adults and children. HYDRA can be used in rooms of 60m2 or 150m3 and has a humidification performance of 420g / h. The setting control knobs and the integrated hygrostat are very user friendly.