... /3216V NVR3204/3208/3216V Dahua Mini Portable Vertical DVR for IP Cameras> Up to 4/8/16 channel with ... TCP/IP, IPv4/IPv6, UPNP, RTSP, UDP, SMTP, NTP, DHCP, DNS, IP Filter, PPPOE, DDNS, FTP, Alarm Server, IP Search ... Interface3ports (1 Rear), USB2.0RS2321 port, For PC communication & KeyboardRS4851 port, For PTZ controlGeneralPower SupplyDC12VPower Consumption20W(without HDD)Working Environment ...