Now it's easy to add moisture to dry air with this specially-designed personal humidifier. Perfect atop a desk or nightstand, this whisper-quiet ultrasonic humidifier emits a soothing cool mist to relieve the discomforts of nasal congestion, itchy skin, chapped lips and dry throat. It features an adjustable mist level and a mist outlet that rotates 360º so you can direct it where you prefer. Simply fill the tank with water, and it works for 8-12 hours, then shuts off automatically when it's empty. The lower tray has a diffuser so you can add your own oils for aromatherapy if you desire. Lightweight and portable with a 5-foot power cord. Plastic and metal. 4"L x 4"W x 7 1/4"H.