To be quite honest mate i'm not sure , ive never used one . Its cheaper just to run a coax from the back of your tv and a y splitter , then you can watch different programs in your bedroom to whats on in the lounge . Its cheapr this way as well .
It depends on the setup of the rooms in your house though whether its gonna easy or not , running the cable up and through the floorboards .
Don't qutoe me on this , i might be wrong . But seeing that its terrestrial tv , and the signal is coming through your coax cable i would guess that you can watch different programs . If it was sky you wouldn't be able to .