This pressurized system needs no battery or electrical power source; it can either be manually filled up and pumped or fastened to a hose. Eight brass nozzles connect to more than 25 feet of food-grade silicone tubing that attaches to the suspension system of a pop-up tent with eight hook and loop straps. A single set of hand pumps of the portable, two-gallon tank can provide up to 20 minutes of misting. Replacement tanks and nozzles are also available. This product was made for workers or anyone dealing with oppressive outdoor heat from workplaces such as road construction.