YOu can go either of the following websites. www.ebay.com or www.amazon.com to purchase a wireless barcode scanner. And they have good deals usually.
Yes, there are wireless scanners. Many of these scanners are included in a printer, scanner, fax combination that is completely wireless and can be purchased at places like Office Depot.
HP Photosmart Premium Wireless Printer/ Copier/ Scanner/ Fax can also be used as a telephone because of Bluetooth capability which provide wire-free performance (requires adapter, not included
I recommend Brother Printer MFC8950DW Wireless Monochrome Printer with Scanner, Copier and Fax.
A dot matrix is an impact printer. A scanner is not a printer.
Wireless router
Wireless printers allow a single printer to be networked by other computers on your wireless network, allows you to make a central location for all printer users, allows you to place the printer further from your computer without running USB cable or further than USB code allows. It does require a wireless router as the hub. Depends on what you want and need.
You can purchase a Xerox scanner from Xerox directly. You can also purchase them from computer and printer supply stores such as Staples Business Depot.
It depends on the printer and scanner - go to the maker's website for instructions.
printer
An all-in-one scanner includes a printer.
You can purchase a Savin copier that also functions as fax as well as a printer and scanner. Its called a multifunction machine.