DVR with VGA,4-channel, H.264 2 channel alarm input, 1 channel alarm output DVR Details:1. H.264 Compression2. ... panel, remote control, network 7. USB interfaces 8.4 channel playback or single channel playback 9. Support LAN, WAN, ADSL 10. Self ... User Interface, Real time operating system ItemsSpecificationsVideo SignalPAL (625Line50f/s), NTSC(525Line60f/s)Video Input4 Channel, BNC , 1.0V p-p ...