wiresless mouse and keyboard

My girlfriend’s dad wants to set up his computer for the optimal laziness. A wireless mouse and keyboard at his couch so he doesn’t need to get up. Unfortunately he has an older microwave, a big screen TV 5 phones (in one room) it is so wattage that his N-plus receiver doesn’t even pick up the signal given by his community which is only hundred feet away (it’s legal) needless to say he can’t get the mouse to work to far away is there any mouse and keyboard built on the 5ghz wavelength?