SR4804A00/SR4804A10 HD-SDI DVR (Digital Video Recorder) receives four Full HD videos (1080P) from SDI cameras over coaxial cables and records them to hard drive in H.264 file format. With broadcast grade bandwidth, SDI interface delivers the uncompressed video data with almost zero latency that could be live viewed on the DVR. SR4804A00/SR4804A10 provides the easy-to-install benefit that allows users to view and record Full HD video without requiring complicated network knowledge. It is the simplest way to upgrade your traditional CCTV system to HD surveillance system and secure your property with clear and more vivid videos.