CCTV stands for High Definition Composite Video Interface and can sometimes be referred to as high definition analog CCTV. It is a relatively new technology that offers the benefits of high definition recording without all of the costs associated with a full IP CCTV system
HDCVI is a revolutionary technology that can transmit high definition video quality over standard RG59 Siamese cable.HDCVI cameras. The next generation of HD security. HD-CVI cameras only works with HD-CVI compatible DVRs.HD-CVI cameras available in 1080P and 2MP also. All-in-one cameras support HD-CVI also. Hybrid CVI DVR can support your Analog cameras. Tribrid HD-CVI DVR can support IP cameras, use Dahua brand to avoid conflicts and compatibility. IP cameras over 2 MP will work but the image quality will be 2 MP because the HD-CVI DVR can support Maximum 2 MP.
If you are using all IP camera use a NVR , they even come with built in POE. Some brands like Dahua and Hikvision are really affordable. They come with 3 years warranty and support from USA.
The HD-CVI camera system is affordable High Definition cameras over coaxial cable with BNC connectors just like your old Analog cameras. Simply replace your old cameras using the HD-CVI cameras
What does the WDR camera do ?
The Wide Dynamic Range (WDR) function of a camera is intended to provide clear images even under back light circumstances where intensity of illumination can vary excessively, namely when there are both very bright and very dark areas simultaneously in the field of view of the camera. WDR enables the capture and display of both bright areas and dark areas in the same frame, in a way that there are details in both areas, i.e. bright areas are not saturated, and dark areas are not too dark.