4 channel cctv system dynamic IP address directly withthe external network connection 1/3" SONY CCD h264 4 channel cctv system 4CH DVR-----(Model:DVR4004)1. H.264 dual-stream video compression2. A variety of display modes: automatic round robin, full-screen, 4/83. Multiple recording modes: manual recording, time recording andalarm recording, motion detection recording4. Resolution, image quality ...