... network connection 1/3" SONY CCD h264 4 channel cctv system 4CH DVR-----(Model:DVR4004)1. H. ... & Exact search (accurate to second), Smart search6. Support multi-channel playback simultaneously,7. Live, recording, playback, backup & remote access8 ... . Provide single / 4 channel audio function9. Support picture in picture display, OSD interfaces, support ...