The smaller newer type of cartridges, the SWC740 fits and works best with the WD841B (a/k/a SWD841WS) Unit. This simple solution uses a dry-air technology that releases fragrance without sprays, aerosols or heated oils.
Releasing fragrance for approximately 30 days, the ScentWavesystem offers adjustable duration and intensity settings making it easy for you to customize the scent output for any environment. Utilizes easy to install scent cartridges. Over 1,600 quality scents to choose from.Adjustable duration and intensity settings. The item "Scentair WD841B ScentWave Scent Air Machine BRAND NEW" is in sale since Friday, May 3, 2019. This item is in the category "Home & Garden\Home Décor\Home Fragrances\Essential Oils & Diffusers". The seller is "teddybear4312" and is located in New York, New York. This item can be shipped to United States.