Brand new in the box. It was ordered for a project that fell through, so it is now being sold.

I'm including a copy below of the description the manufacturer has online.

Data Link Protocol: Ethernet

Data Transfer Rate: 10 Gigabytes Per Second

Item Weight: 175 Grams

Equipped with original Intel 82599ES Controller Chip, same as Intel X520-SR2 Server Adapter.

PCI Express* 2.0. 5.0 G T/s X8 Lane; Cabling Type: SFP+ Direct Attach Cable/SFP+ Module/SFP+ AOC.

Coming with low-profile bracket as well as full-height bracket.

Provides advanced unified networking capabilities, including support for iSCSI, NFS, and FCoE.

Supported Operating Systems: Windows Server 2012 R2*/ 2012*/ 2008 R2*/ 2008* SP2/ 2003 R2*/ 2003* SP2, Windows 7*/ Windows 8*/ Windows 10*, Windows Vista* SP2; Linux* Stable Kernel version 3.x, 2.6,x; Red Hat Enterprise Linux* 5, 6; SUSE Linux Enterprise Server* 10, 11; FreeBSD 9*; VMware ESX/ESXi*.

✅NOTE: SFP adapter is not included in the package✅