Step 3: Select black and white or color: If you are going to use the
cameras in an environment where the light conditions are very low,
it is recommended to buy a black and white CCTV camera system.
Color should only be considered for inside use with good lighting
conditions.
Step 4: Understand light level: One of the most important
specifications. Light levels are measured in Lux. The lower the
number, the less light it will take to reproduce a clear image.
Understand resolution: The higher the resolution number, the
sharper the image will be.
Step 5: The last is don forget to Select a monitor that will match
the resolution of your CCTV camera system. CCTV cameras system
recorders: DVR (digital video recorder) which record onto hard
drives is the best option.