When you turn on the Cool Wave a circular mini-fan draws air in through the Intake Vents, creating a refreshing breeze under your shirt and across your back. When you hit the Mist Bulb, air moves through a tube into the Atomizer, which draws water from the Reservoir and sprays a fine mist under the Mist Shield and onto your back. When air is blown across your moistened back, it creates comfortable evaporative cooling.
When you come out of the water on a hot day and catch a breeze, you feel cool. Cool Wave uses the same principle to cool you. Uses 2 "D" Batteries (not included).