... promotion- h.264 4 channel cctv dvr recorder network(D2804S1). 1. H.264 Main Profile Compression2. 4 channel real time recording, 4 channel real time synchronous playback3 ... Support Various network protocols: SMTP, UPNP, DDNS, PPPOE, etc. VideoInputBNC×4,(1.0Vp-p,75Ω)CVBS OutputBNC×1,(1.0Vp-p ... (H) mm Weight(without HDD)2.0KGcif Weekly promotion- 4 channel h.264 cctv dvr recorder network(D2804S1)