NVR502-16B-P16 Name guard viewer NVR 4K Channel 4ch / 8ch / 16ch POE Protocol TCP/IP; P2P; UPnP; NTP; DHCP; PPPoE; HTTP; HTTPS; DNS; DDNS; SNMP video format H.265 H.264 Playback 4ch/8ch/16ch HDD support 2SATA HDD max storage ...