This is a somewhat peculiar item because it isn't suitable for every task—let me explain:
As we all know, K&F specializes in photography gear; however, I wouldn't use this on my camera unless it were a national emergency.
The blower packs a lot of power—much more than a standard air blower bulb—and that is both a good thing and a bad thing. Camera sensors are relatively delicate and shouldn't be subjected to such a powerful blast of air.

That said, I *have* used it—for instance, to clean a laptop (I aimed it at one ventilation grille, and a cloud of dust billowed out of the other, so it definitely works).
So, as I mentioned, you really need to know what to use it for and what to avoid. It features three power settings, and the maximum setting is EXTREMELY powerful. So powerful, in fact, that I’m baffled as to how they managed to pack that much force into such a compact device.
The only downside is that it tends to heat up a bit when running at full power for 30 seconds to a minute (which happened while I was cleaning the laptop).
It is true that it also functions as a vacuum, but I don't find that feature quite as useful—or as powerful—as the blowing function.
All in all, I would recommend using it for electronics or hard-to-reach areas (aside from a laptop, a keyboard comes to mind), but I would exercise extreme caution when using it near camera sensors.
It comes with a wide assortment of accessories and nozzles.