By co-incidence, just read this paragraph in 1984;
As O'Brien passed the telescreen a thought seemed to strike him. He stopped, turned aside and pressed a switch on the wall. There was a sharp snap. The voice had stopped.
Julia uttered a tiny sound, a sort of squeak of surprise. Even in the midst of his panic, Winston was too much taken aback to be able to hold his tongue.
" You can turn it off ! " he said.
" Yes ", said O'Brien, " we can turn it off. We have that privilege. "
Virgin, do yourself a favour. Turn it off.