The Plug-N-Play aroma diffuser by Aroma Retail is a limited quantity item. Designed originally for a custom order going into Big Box stores, we have an overstock of units. These are limited and a final sale item. Fragrance oil is not included. Coupons will apply. This model is sleek, quiet, and houses a very powerful atomizer that requires little effort to set up and adjust. One machine can cover up to 2,000 square feet of open space, with the ability to be adjusted down for smaller spaces with simple changes to the intensity percentage. The rate of fragrance oil usage will vary depending on the settings. 10oz of fragrance oil will last two months at average intensity running every day for 12 hours per day. Key Features Up to 8 weeks between refills Noise level as low as 35 dBA Free standing or wall mounted  Easy to use Uses only non-toxic pure-grade fragrance oils Cold fusion technology diffuses without the heating For an app driven unit, try the Smart 101