The Hikvision DS-7616NI-Q2/16P 16Port Qseries NVR is a 16PoE port Network video recorder that lets you centrally manage IP camera settings, including configuration, information import/export, real-time information display, two-way audio, upgrade, etc. The Q Series is the entry-level IP CCTV solution.

Product Specification:

Model number: DS-7116NI-Q2/16P

Motion Detection 2.0: Human/Vehicle Analysis 4-ch
Video and Audio: IP Video Input 16-ch
Audio Output: 1-ch, RCA (Linear, 1 KΩ)Two-Way Audio: 1-ch, RCA (2.0 Vp-p, 1 k Ω)
Stream Type: Video, Video & Audio
Audio Compression: G.711ulaw/G.711alaw/G.722/G.726
Network Protocol: TCP/IP, DHCP, IPv4, IPv6, DNS, DDNS, NTP, RTSP, SADP, SMTP, SNMP, NFS, iSCSI, ISUP, UPnP™, HTTP, HTTPS
Network Interface: 1, RJ-45 10/100/1000 Mbps self-adaptive Ethernet interface
Power: ≤ 150 W
SATA: 2 SATA interfaces
Capacity: Up to 8 TB capacity for each disk
Alarm In/Out: N/A (4/1 is optional)
USB Interface:  2 × USB 2.0
Power Supply: 100 to 240 VAC, 50 to 60 Hz
Consumption: ≤ 15 W (without HDD and PoE off)
Working Temperature: -10 °C to 55 °C (14 °F to 131 °F)
Working Humidity: 10% to 90%
Dimension: (W × D × H) 385 × 315 × 52 mm (15.2″× 12.4″ × 2.0″)
Weight: ≤ 2.6 kg (without HDD, 5.7 lb.)

Lastly, the Hikvision DS-7616NI-Q2/16P 16Port Qseries NVR  is the most affordable NVR series.