Our indoor/outdoor Fog Machine will create instant atmosphere at any party or event. Each of the 700 watt Fog Machines will provide up to three to four hours of dense fog with one quart of fog liquid and generates 1,800 cubic feet of fog per minute. The amount of fog which is produced can not be adjusted. The metal Fog Machine measures 12 1/2 inches x 6 inches x 5 inches and is electric. Fog Liquid sold separately.