Features of 18000cmh 1.1kw swamp cooler 1. Multiple Function: Air cooler, Fan, Purifier and Humidifier. 2. Honeycomb wet pad for optimum performance, which provides the largest contact area. 3. Adjustable air level to your comfort. 4. Mounted with castors for easy mobility. 5. Simple operation and good appearance. 6. Over current and overvoltage protection.