StarTech.com PEX4S553. Host interface: PCIe, Output interface: Serial, Serial interface type: RS-232. Mean time between failures (MTBF): 26280 h, Certification: CE, FCC, REACH. Chipset: ASIX - MCS9904CV-AA, Baud rate: 128 Kbit/s, FIFO (First In, First Out): 256 B. Windows operating systems supported: Windows 10,Windows 10 Education,Windows 10 Education x64,Windows 10 Enterprise,Windows 10..., Mac operating systems supported: Mac OS X 10.10 Yosemite, Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard,..., Server operating systems supported: Windows Server 2003,Windows Server 2008 R2,Windows Server 2012,Windows Server 2012 R2,Windows.... Width: 5.12" (130 mm), Depth: 4.72" (120 mm), Height: 0.748" (19 mm)