As Seen on TV — Experience your own personal desktop air conditioner with the Kool-Down™ Evaporative Air Cooler! 32oz. reservoir feeds water to an evaporative filter, then passes dry hot air through the filter - returning a refreshingly chilled and moistened breeze to your home or office. Handy indicator lets you know when the reservoir needs to be refilled - once every 10-12 hours of operating time. Our eco-friendly cooler uses absolutely no Freon, yet cools up to 49 square feet! Uses 4 C batteries (not included), or use the included AC adapter. 6" x 11½" UL Listed.