TP-LINK 4 CHANNEL POE NETWORK video RECORDER 4 FE POE+ PORTS - VIGI NV R 1004H-4P with 4x TP-LINK IR Turre nt Network Camera 2MP I H.265+ (VIG I C420I (2.8mm) Image Sensor:  1/3” Progressive Scan CMOS Lens:  2.8 mm/ 4 mm Aperture:  2.8 mm: F2.2 ,4 mm: F2.0 Lens Mount:  M12 Viewing Angle:  2.8mm: 88.2°/48.7°/106.5°(H/V/D) ,4mm: 74.6°/41.3°/88.1°(H/V/D) Day/Night Mechanism:  IR Cut Filter IR Working Distance:  30m Minimum Illumination:  Color: 0.1 Lux; 0 Lux with IR Digital Noise Reduction:  3D DNR WDR:  DWDR NETWORK Security:  Password Protection, HTTPS Encryption, IP Address Filter, Digest Authentication Protocol:  TCP/IP, UDP, ICMP, HTTP, HTTPS, DHCP, DNS, RTSP, NTP, UPnP UDP, SSL/TLS API:  ONVIF Simultaneous Live View:  3 Main Streams & 3 Sub-Streams Client:  VIGI App, VIGI Security Manager, VIGI NVR