Add both moisture and a soothing scent to your space with this handy Comfort Zone Personal Wave Aromatherapy Humidifier. Featuring a built-in diffuser, this portable humidifier allows you to add essential oils (sold separately) to give the mist a pleasant scent. The versatile unit can be operated with or without the aromatherapy tray. Offering a 0.15-gallon capacity, this cool mist humidifier can provide up to eight hours of operation. Ideal for spaces like bedrooms, offices and other small rooms, this ultrasonic humidifier runs whisper quiet to allow you to work or rest without distractions. The aromatherapy humidifier diffuser boasts a convenient knob at the front that lets you quickly adjust the intensity of the mist, and the outlet swivels 360 degrees to allow you to aim it wherever it is needed most. An auto shut-off feature ensures that the humidifier switches off whenever all of the water has been used up, helping to prevent damage to the unit if it is accidentally left on.