... wireless Magnetic door,infrared detectors and so on.SuperiorityP2P technology, no need port forwad, save bandwidth, cell phone video monitormutile ... 4,9,16,25,36, 64-channel mutile softwarre , no user limited professional software, centralized monitor, remote record and playback ... 11 b/gOnline visitorSupport 5 visitors at the same time, but no limitation when using P2P.IP modeDynamic IP address, static ...