This article discusses security NVR systems and how they can protect homes and businesses. It explains that an NVR system involves using multiple cameras to digitally record and store video that can then be accessed over the internet. Key factors to consider when purchasing an NVR system include the number of cameras, video quality, and ensuring outdoor cameras are weatherproof. Installation is also described as straightforward, only requiring mounting cameras, connecting them to the NVR unit, and configuring the system to work with a router and firewall.