The best way to combat dry air and reduce your susceptibility to infections is to have a humidifier. Ultrasonic Humidifiers use high-frequency vibrations to generate a micro-fine mist which is output into your room for increased humidity. The Ultrasonic technology quietly disperses a fine mist providing relief from the dry air. Cool-mist humidifiers are best used to combat allergies while warm-mist humidifiers offer relief for those with asthma, a cold, the flu or a respiratory discomfort. This Aromatherapy Essential Oil Diffuserandair purifier fight the growth of mold and mildew and tolerate a clean air for a safer pollution-free environment. It can also be used as a LED night lamp and with matching colorful gradient that can surely bring relaxation to your room.