i was told i could run cable from a tv set in one bedroom  to another room, to another set , without having to buy another box. i have direct tv   some thing about having to watch  the same program  in room  1  to room 2 but i did not ask  where do you  screw in the   cable   from room 1  tv box  to room  2 tv set  thanks   kb

Yes, you can run multiple tvs off the single box.

To do it, you'll need a splitter. They are available almost anywhere. Home Depot, Best Buy, Radio Shack, hardware stores.

Use a short cable to connect the splitter to the box. You'll connect the box to the lone connector on one side. Then run two cables, one to each tv from the splitter, and you're good to go.

This is a typical splitter. Can be had for a few bucks.