Bring total convenience and maximum comfort into your living space. The 120-Hour Warm or Cool Mist Humidifier with Digital Display features a programmable humidistat, warm and cool mist, letting you create your ideal atmosphere. Dual top-fill water tanks provide up to 120 hours of runtime depending on setting — and make filling and cleaning a snap. Plus, add relaxing or invigorating essential oils to your preferred mist with the convenient essential oil tray.