You can’t see it - but you know it works by the amount to dust and pet hair is blows out of the computer. I’m sure it’s the same air that’s contained in the “name brand ” but it’s less expensive. This is one of the cases when cheaper is better!
overpriced also after one push of the can the cap broke off so now it takes 3 hands to use; one to hold the can another to hold the cap from falling off & a third to press the button