No drivers or AC adapter required for use and this setup is completely "Plug and Play" meaning that you can use it straight out of the box!  

If you are looking for a larger quantity, I sell lots of 10 here for less than $28 each: Lot of 10x MS9520 with MX009 Cables

I've personally tested these with Windows 2000, ME, XP, Vista, Win7, Win8, MacOS X, Linux, and Unix (all of which don't require driver installation).  Data will be input wherever the cursor is on the screen or wherever data normally would show up when you would type on a USB keyboard. 

Scanners may have minor cosmetic defects such as missing decals or light wear from normal use. 

If you are unsatisfied for ANY reason, I will accept returns or exchanges within 30 days of receipt.  They also have a 6 MONTH exchange warranty.  Shipping will be FREE to the USA by USPS, Fedex ground, or UPS ground depending on location and quantity ordered.  International shipping cost is determined by ebay's shipping calculator based on location and does not include any international taxes imposed by the buyer's country (if charged, these taxes are to be paid by the buyer upon receipt).  Thanks for looking and please ask any questions you may have!