4-ch Mini 1U NVR. Network Protocol TCP/IP, DHCP, HiLookVision, DNS, DDNS, NTP, SADP, SMTP, UPnP™. USB Interface Rear panel: 2 × USB 2.0. Remote Connection 16. Working Humidity 10% to 90%. FCC Part 15 Subpart B, ANSI C63.4-2014.
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