Air coolers are perfect if you want more cooling power than a fan, but don’t want the hassle and expense of an air conditioner. They use a natural process known as evaporative cooling to chill the air – this involves allowing a tank of water to evaporate, which dramatically cools the air. It’s the same way that the wind cools when it blows over a lake, and it gives you a more refreshing, natural-feeling breeze. It also uses no additional energy when compared to a tower fan – this unit uses just 75W power, so it’s good for your energy bills and kind to the planet. Features: With the choice of 3 wind speeds and 3 wind modes that can be adjusted to meet your personal needs. The maximum rotation speed of the cooler reaches 6.2 m/s, Automatic left to right rear louvers and manual up-down front louvers enables you to adjust the blowing direction to 120 degrees, create your own perfect cooling zone. The minimum wind speed is only 50 db which does not disturb your rest