The Crane EE-4140 cow ultrasonic cool mist humidifier helps relieve the symptoms brought on by dry air such as nasal congestion, dry nose, throat, lips and skin. It adds moisture to the air which moistens your skin and nasal passages, making it easier to breathe. Low Power Consumption The Crane EE-4140 ultrasonic humidifier does not use more electricity than a standard light bulb. Large Effective Range The EE-4140 cool mist humidifier features a 250 square foot effective range. Powerful Moisture Output Every day, this humidifier releases up to 2.1 gallons of moisture per day. Removable Water Tank The EE-4140 includes a removable water tank that is easy to refill and store.