Telescreens are devices that operate simultaneously as televisions, security cameras, and microphones. They are featured in George Orwell's dystopian 1949 novel Nineteen Eighty-Four as well as all film adaptations of the novel. In the novel and its adaptations, telescreens are used by the ruling Party in the totalitarian fictional State of Oceania to keep its subjects under constant surveillance, thus eliminating the chance of secret conspiracies against Oceania.