The NS4140 is a true surveillance grade camera that can be used for indoor or outdoor monitoring purposes with the added bonus of being able to provide a great image even in complete darkness, thanks to the infrared illuminator that comes standard with the package. This camera incorporates all the features of the NS4120 plus an IR illuminator, Tamron 4mm day/night lens and Sony 1/4 " day/ night CCD. The camera includes a GPIO port video that is used to connect any analogue CCTV camera to the device.