The twin pack Germ Guardia® Pluggable UV-C Room Air Sanitizer eliminates over 98% of airborne germs. It also destroys odors and allergens like dust mites and mold spores. Plug it in next to the diaper pail, in the kitchen or bathroom. Moms and dads love it next to the diaper pail, and pet owners use it to destroy germs and fight unwanted odors. The UV-C bulb should be replaced every 6-8 months depending on use.