Samsung SRN-473S 3TB. Video input channels: 4 channels, Video formats supported: H.264, M-JPEG, Languages support: Multi. Maximum storage capacity: 4 TB, HDD interface: Serial ATA, Total installed storage capacity: 3 TB. Supported network protocols: TCP/IP, UDP/IP, RTP (UDP), RTP (TCP), RTSP, NTP, HTTP, DHCP (Server, Client), PPPoE, SMTP, ICMP,.... Power consumption (typical): 77 W. Windows operating systems supported: Windows 7 Enterprise, Windows 7 Enterprise x64, Windows 7 Home Basic, Windows 7 Home Basic x64,..., Mac operating systems supported: Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks, Browser supported: Microsoft Internet Explorer, Mozilla Firefox, Google Chrome, Apple Safari