Refill fragrance pads - Easy to use: Simply insert the fragrance pad into the vaporizer plug (not included) and plug the vaporizer into the wall socket. - Heat activates the menthol vapors* in the VapoPad and releases them into the air. - Up to 8 hours of comfort per pad - Guide slots make it easier to insert and remove the fragrance pads. *Wick-Menthold vapors contain no medicinal substances