A security camera, also known as a surveillance camera, is a form of video camera that is used for security reasons to monitor and record activities in a given area. Security cameras are used to discourage criminal activity, monitor employee conduct, and gather evidence in the case of a crime in a number of settings, including residences, companies, and public locations. Most security cameras today are digital and can record high-quality video footage that may be watched in real-time or afterwards. Some cameras additionally offer extra functions, such as infrared sensors for night vision, motion detection sensors, and the ability to pan, tilt, and zoom to cover a larger area.