The three sides ice curtains. Add water from the top,large capacity water tank,no need to add water frequently.Using ice crystal refrigeration,can improve the cooling effect., Air Conditioner 3 gear wind speeds (low, medium, high). automatic wind swing from left to right, and manual adjustment up and down. The universal wheels are sturdy and durable, easier to move., The air-conditioning fan is cooled by physical water evaporation. When the wind blows, it is very cool.It is completely different from the principle of air conditioning., The effect of cold wind depends on the temperature of the water, and the cooler the water, the better the effect of cold wind. Cold air only adds water without ice crystals can cool down about 1-2 degrees with ice crystals can cool down about 5-6 deg,