This product is not simply an odour eliminator but an air freshener that gives a beautiful scent inside the house. You can just leave this plugged-in 24-hours in a day. That's what differentiates it from my previous review on Nilodor (this is an odour eliminator spray for fast remedy; and doesn't have the same scent as Oust). I have read a review about Oust Air Freshener Spray and the reviewer was not satisfied with the product. I highly recommended Oust Plug-in.
Oust Plug-in comes with two scents: Flower fresh and outdoor scent. I personally prefer the outdoor scent as it is very pleasant yet very mild and makes my home smells so clean.
What Johnson is proud of about this product is that it doesn't mask bad odour but it definitely eliminates it. It comes with a special formula they call NEUTROZONE which they say is scientifically designed to neutralize bad odour molecules in the air.
The electric diffuser is sold separately with one refill included. The electrical diffuser is adjustable with a dial from 1-5. You can adjust it depending on how much or how strong you want the scent to come out of the diffuser. I often set it to 3 which is not too strong or not too mild. That way I think I also use it more economically. One refill lasts for 4 to 5 weeks in my house. I also plug one in my bathroom, but only turn it on as needed.