VCR is a device that enters the signal captured by security cameras. Without such a device or a video surveillance system can not fulfill its purpose as the cameras themselves can not provide you with an image of the protected object. They only accept signals, then sent to the device, making it formatted and converted into picture, but also in sound when the system is suitable for audio recording.
VCRs are devices that receive, record and store footage from surveillance cameras. These devices vary by variety and working principle, depending on how CCTV use. Here we will introduce you to the types of recorders and differences between different systems.