The Beurer Air Humidifier is ideal for a babys or toddlers room to keep the humidity at the optimum levels. It is extremely quiet so can be used throughout the night so the child does not get drying of the mucous membrane in the nose and stops the throat drying out making sleep much easier and more comfortable. It works when a membrane in the humidifier, vibrated by ultrasound, moves the water and releases tiny water droplets from the surface. The fan then draws in air, the air is humidified with the released water droplets and blown gently upwards and a stream of humidified air is released into the room. Suitable for room size 25m. Ultrasonic humidification. 2.8 L water tank. Manufacturers 2 year guarantee.