The Hikvision DS-7632NXI-K2/16P 32Ch Kseries NVR is a 16PoE port 32channel  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.

Product Specification:

Model Number: DS-7632NXI-K2/16P

Intelligent Analytics:  AI by Device Facial recognition, perimeter protection, motion detection 2.0, Facial recognition, perimeter protection, throwing objects from the building, motion
Facial Recognition: Facial Detection and Analytics Face picture comparison, human face capture, face picture search Face Picture Library
Up to 16 face picture libraries, with up to 20,000 face pictures in total (each picture ≤ 4 MB, total capacity ≤ 1 GB)
Facial Detection:  1-ch, 8 MP
Face Picture Comparison: 4-ch
Motion Detection 2.0: All channels, 4 MP (when enhanced SVC mode is enabled, up to 8 MP) video analysis for human and vehicle recognition to reduce false alarm
Video and Audio: IP Video Input 32-ch
Audio Output: 1-ch, RCA (2.0 Vp-p, 1 KΩ, using the audio input)
Two-Way Audio: 1-ch, RCA (Linear, 1 KΩ)
Stream Type: Video, Video & Audio
Audio Compression: G.711ulaw/G.711alaw/G.722/G.726/AAC
API ONVIF (profile S/G); SDK; ISAPI
Compatible Browser: IE11, Chrome V57, Firefox V52, Safari V12, Edge V89, or above version
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
Interface: 16, RJ-45 10/100 Mbps self-adaptive Ethernet interface
Power: ≤ 200 W
SATA: 2 SATA interfaces
Capacity: Up to 10 TB capacity for each HDD
USB Interface Front panel: 1 × USB 2.0; Rear panel: 1 × USB 2.0
Alarm In/Out: 4/1
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 mm × 315 mm × 52 mm (15.2″× 12.4″ × 2.0″)
Weight ≤ 3 kg (without HDD, 6.6 lb.)

Lastly, the Hikvision DS-7632NXI-K2/16P 32Ch Kseries NVR  is the most affordable NVR series.