Humidity and mist controls allow you to easily adjust the level of humidity distributed in your home (effective up to 538 sq ft)</br>1.3L capacity permits over 7 hours of use?? featuring a built-in timer?? sleep mode?? and a 360 degree rotating nozzle</br>Microporous Filter Cartridge filters out microorganisms and negative ions from water for a cleaner and healthier vaporizer humidifiers mist</br>Ultrasonic technology runs silently?? providing cool humidifying mist without excess noise</br>All of our products feature a lifetime guarantee: if you are not 100% happy with your cool mist humidifier?? please contact us</br><br/>http://www.amazon.com/gp/product/B01MTWEI96