... /IP,UDP,DHCP,DNS,IP filter, PPPOE, E-mail, Alarm server, UPNP, DDNS,DNS BindingRemote operationMonitor, PTZ control, Playback, System setting ... USB2.0 interfaces,mixed use for back-up and mouse.4.Support six simultaneous operations for recording, playback, network transmission, backup ... , Symbian, Android, iPhone and Blackberry etc. H.264 network 4ch digital video recorder