Hanwha QRN-1630S. Video input channels: 16 channels, Maximum resolution: 3840 x 2160 pixels, Video recording modes: 720p, 1080p. Maximum storage capacity: 20 TB, HDD interface: SATA. Supported network protocols: IPv4, IPv6, TCP/IP, UDP/IP, RTP (UDP), RTP (TCP), RTSP, NTP, HTTP, DHCP (Server, Client), SMTP,.... Power consumption (typical): 200 W, AC input voltage: 100 - 240 V, AC input frequency: 50 - 60 Hz. Windows operating systems supported: Windows 10, Mac operating systems supported: Mac OS X 11.0 Big Sur