The EcoGecko Solar System is a powerful workhorse for neutralizing unpleasant odors in your space. Simply fill the bowl with tap water, turn on the UV light and add a few drops of the included aroma oil and turn on the freshness. As the Air passes by the UV light, bacteria and viruses are knocked out. UV lights have been proven to kill bacteria. 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 gently swishing water creates soothing white noise for a peaceful and restful environment. The UV Light can be turned on/off with the flip of a switch.