[stordoff]

Telescreens more or less fit the bill. From Wikipedia:

> Telescreens are fictional devices which operate as both televisions and security cameras. [...] All members of the Inner Party (upper-class) and Outer Party (middle-class) have telescreens in their homes [...] Telescreen cameras do not have night vision technology [but] their microphones are incredibly sensitive, and they are said to pick up a heartbeat.