Swann Surveillance System 1080p (4pcs Camera)This system includes Swann's True Detect PIR Thermal Sensing technology to reliably detect heat generating moving objects, such as people, large pets & cars. With more accurate motion detection you have more reliable notifications & recording, eliminating false triggers such as falling leaves, bugs, rain & more, saving hard drive space & playback time. It can even be set to send push notifications when movement is detected! Supplied with 4