When the PIR is activated then the camera is activated and transmits data to the receiver.
It works by measuring the Infra Red (IR) light radiating from an object such as a human being in its field of view and detecting the subsequent radiant heat emitted.
At night time the light sensor is used to determine if the Infra-Red LEDs are also activated when the camera is activated by the PIR.
Two-way talk back can also be used when the camera is activated, using the Microphone on the front of the camera and the Built-in speaker.
