The EcoGecko Color Wheel is a powerful workhorse for neutralizing unpleasant odors in your space. Simply fill the bowl with tap water, add a few drops of the included aroma oil and turn on the freshness. The unit has a fan system that sucks the air from the room into the water. The air is pushed through the aroma oil scented water, particles are trapped in the water and pleasantly scented air is released back into your room. The Color Wheel has 7 LED light colors to choose from. Let the unit rotate through them all, or choose and lock on the color you like best. The light can also be turned off completely.