★Energy saving, environment-protecting, long-lasting, strong airflow and good effects in cooling. Can lower the temperature by 4-12 degree, with a air-sending distance of 8-10 m (length) and 6-10 m(width) ★No assembly or installation needed, portable and movable can be used in any flat floor. But large cooling room is not recommended, better for fixed-position cooling ★Designed for totally open environment. Can be widely used factory, workshop, vehicle maintenance workshop, open air concert, building site, exhibition museum, motel, toll house, also suitable for home use. ★ITEM#EC-45-M has a power cost of only 155w (less than RMB0.1/hr), which can circulate and cool the air in a 25 sqm open area. (Nearly equals to the cooling effects of traditional 2P stand air conditioners ) I★TEM#SCF-80-M has a power cost of only 600w(less than RMB0.8/hr), which can circulate and cool the air in a 80-100 sqm open area.(Nearly equals to the cooling effects of traditional 10P stand air conditioners ) ★This product cools the air using water as cooling media, by the principle that water will absorb heat when evaporating. So the cooling effect is largely related to air humidity and temperature. The more dry and hotter the weather is, the greater cooling effects will come out. ★Please make sure the window is open when the product is used, then the product will be on the best performance.