... h.264 dvr -H.264 realtime hd dvr -USB,PTZ,Audio,Network,VGA,HDMI -720P DVR HD realtime recording -CMS/IE management 4 channel HD DVR Features: 1. H.264 ... Real-time Recording, support USB, PTZ, network, two-way ... Steady System Function;4. Playback, video, network transmission, mobile browsing, and backup etc. work ... 405(W) * 55(H) * 320 (D) Weight4.5kg 4ch HD H.264 DVR