I gave the rating of three stars portending that it is just an electronic duster. It works just like the rest. It does not do any more or any less than the purpose of it use.
Performed well cleaned out our carbon monoxide detectors just fine. The lock on the trigger for safety during shipping was kind of difficult to snap off for use but we managed.
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!