What is Digital video Recorder (DVR)?
A digital video recorder (DVR) is an electronic device that records video in a digital format to a disk drive. A DVR is basically a VCR that uses a hard drive instead of video tapes. It can be used to record, save, and play back television programs. Unlike a VCR, however, a DVR can also pause live TV by recording the current show in real time.
How Digital video Recorder (DVR) works?
Explain about CCTV (Closed-circuit television)?
What is IP camera and how does it work?
What is AV hard disk?
Explain Power Supply and It’s function?
How will I know when I run out of space on my DVR?
Can I review recorded video and keep recording at the same time and not lose any recording time?
Can you explain about Varifocal lens?
Explain P2P?
What is NVR?
How I know my DVR hard disk is properly works and records?

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