Homedics BRT-150 Brethe Air Revitalizer Neutralizes up to 99% of odor causing bacteria and removes odors caused by pets, smoke and other odor causing bacteria The unique vortex cleaning action uses an intense "rainforest" mist to wash incoming air with an emulsified botanical solution This 100% natural botanical solution comes with a choice of 3- 2.03 fluid ounce scents. Refreshing citrus, energizing lime and soothing vanilla No bacteria filled wicks or filters are required and the air revitalizer also helps to maintain optimum humidity levels The soothing blue light adds ambiance to any environment