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Instruction: 
The bigger the monitor size, the better it will be to view image details. If you only need to know about events that occur, then a 5" B/W monitor would be OK, but if you need to view more details and want better potential for identification, then choose a larger monitor that is at least 12" or more.
In situations where events need to be monitored at night, black and white cameras are used with infrared illuminators. Infrared light is used because black and white CCD cameras have very good sensitivity in and near the infrared region. These are wavelengths longer than 7000nm (nanometers). The human eye can see up to 700nm wavelength, and anything above 700nm is invisible to the human eye. Most infrared illuminators come in 730nm, 830nm, and 950nm wavelengths. These infrared illuminators are invisible to the human eye, and that's why they're perfect for night monitoring. You will be able to see in total darkness with these infrared illuminators, without anyone knowing.
A widely accepted coaxial cable termination in CCTV is the BNC termination. There are three different types of BNC connectors availabe in the market. The most commonly used and found would be the male BNC connector. Other BNC connectors are also available, such as the female BNC plugs, and BNC to BNC barrels.