DVR Hikvision DS-7104HGHI-F1, 4-ch BNC interface (1.0Vp-p, 75 Ω), 720p ,G.711u, -ch, RCA (2.0 Vp-p, 1 KΩ) (using audio input), 1-ch RCA(Linear,1kΩ), TCP/IP, PPPoE, DHCP, EZVIZ Cloud P2P, DNS, DDNS, NTP ,SADP, SMTP,SNMP, NFS, iSCSI, UPnP™, HTTPS, 1 SATA In