If you haven't yet purchased your wireless keyboard or mouse, see our best keyboards and best mice lists. Installing a wireless keyboard and mouse begins with unpacking all of the equipment from the box. If you purchased this as part of a rebate program, keep the UPC from the box. Different products have different requirements, so check the included instructions if you have them. Since the keyboard and mouse you're installing are wireless, they won't receive power from the computer like wired keyboards and mice do, which is why they require batteries. Turn the keyboard and mouse over and remove the battery compartment covers.