With adequate light the camera will display a color picture. Once the light level drops, the cameras change to black and white which allows them see in lover light levels. At the same time the infrared illuminators around the camera lens are turned on and project an infrared light from the cameras allowing them to see in complete darkness.
If you click on the link below you will see the great quality of the video for yourself. This equipment is top quality which allows the picture to be delivered in real time. Kits purchased from discount retailers do not have the higher quality and they do not display the video in real time.