Get a healthier, happier home with the Pure Guardian H940AR 3-hour Ultrasonic Cool Mist Humidifier. It emits a cool mist over a 30-hour period using Ultrasonic Technology that's quiet, so it won't disturb light sleepers. A mould- and mildew-resistant tank ensures air stays pure and fungus-free. It also comes with an aromatherapy tray for your essential oils. | PureGuardian Cool Mist Humidifier with Aroma Tray - White/Blue