The filter is manufactured with advanced nanotechnology. It magnetically attracts liquids and contains no toxic chemicals. Changing the filter cartridge every 2 to 3 months saves cooling energy. The replacement cartridge quickly absorbs water and heat. Mineral fibers prevent the growth of mold and bacteria. Easy installation in seconds. After 2 minutes, the evaporative cartridge is fully hydrated and gradually cools the room air. The large evaporative surface is very efficient. The high-quality stone filter eliminates unpleasant odors and keeps the air fresh. The oversized and efficient evaporative surface creates a soft and healthy mist. Enjoy clean, fresh air and save money by replacing the filter instead of buying a new air cooler. The wind removes the negative ions produced during cooling. When the skin is closed, the body temperature can reach about 5–8 degrees.