This MYLEK Air Cooler uses a natural process called evaporative cooling to chill your room. This gives them more cooling power than a fan at a much lower cost than an air conditioner. Air coolers use a tank of cold water that slowly evaporates during the day. As it does this, it sucks some of the heat out of the air, meaning they blow out an extra-cool breeze into your room! This produces a breeze that feels natural, making you feel cool on hot summer days! Features: This Air Cooler is a cooler, humidifier, air purifier and a normal fan all in one! Not only does it blow out cool air, but it also purifies your air, releases cool moisture into the air and can be used as a normal fan without the cool function. You can even add ice packs (4 are included with every purchase) or ice into the air cooler for more cooling power Thanks to the LED display, this air cooler is super easy to use. From here you can see the power light, cooling option, speed setting, swing feature, and timer setting.