Designed for globally increasing surveillance requirements, MR-5516 is a high performance standalone Digital Video Recorder. It takes H.264 compression format to not only improve video quality but also extend recording time over the same hard disk capacity. Furthermore, the system stability and scalability can fulfill all your surveillance requirements. With Quadruplex support, Live, Record, Playback and Network can be performed simultaneously. This high-quality DVR is absolutely the best choice for your security surveillance.