I own this but didn't buy it, I was assigned it, brand new, by the company I work for. It attaches through a USB port on a laptop. I suppose it'd work on my desktop, as well, but I'm afraid to try it.

  After installing it and configuring the scanner to the lap top, and caliberating it, and practicing with it, I figured it would be easy to use. Which is why I'm giving it the one star it deserves. It is easy to use. I took it to my faciliity, and it would not work. While scanning, it scanned everything in a solid black line. I recalibrated it, and switched USB hubs, and it works. Only when you have a peice of paper going in it. If you buy this, (and I'd shop around,) you must have a peice of paper going into the scanner, before you tell the computer you're scanning. If you donot have paper going into it, and select scan, the scanner will die and disinstall itself, and you have to recalibrate it. If you disconnect the power source from the lap top, and you have the scanner plugged in, the scanner will not be found by the laptop. If you have the mouse into anotehr USB port, the scanner has to be switched with the mouse, this happens too many times for me to be comfortable with it. Frankly, I'm  afraid of it. So, don't buy this scanner. It's horrible.
I own this but didn't buy it, I was assigned it, brand new, by the company I work for. It attaches through a USB port on a laptop. I suppose it'd work on my desktop, as well, but I'm afraid to try it. After installing it and configuring the scanner to the lap top, and caliberating it, and practicing with it, I figured it would be easy to use. Which is why I'm giving it the one star it deserves. It is easy to use. I took it to my faciliity, and it would not work. While scanning, it scanned everything in a solid black line. I recalibrated it, and switched USB hubs, and it works. Only when you have a peice of paper going in it. If you buy this, (and I'd shop around,) you must have a peice of paper going into the scanner, before you tell the computer you're scanning. If you donot have paper going into it, and select scan, the scanner will die and disinstall itself, and you have to recalibrate it. If you disconnect the power source from the lap top, and you have the scanner plugged in, the scanner will not be found by the laptop. If you have the mouse into anotehr USB port, the scanner has to be switched with the mouse, this happens too many times for me to be comfortable with it. Frankly, I'm  afraid of it. So, don't buy this scanner. It's horrible.