StarTech.com 4 Port USB to DB9 RS232 Serial Adapter Hub – Industrial DIN Rail and Wall Mountable. Host interface: USB 2.0 Type-B, Hub interfaces: Serial. Product colour: Black, Housing material: Steel, LED indicators: Activity. Power source type: USB, Power plug type: Type M. 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 10.11 El Capitan, Mac OS X 10.12 Sierra, Mac OS X 10.13 High..., Server operating systems supported: Windows Server 2003, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows.... Width: 59 mm, Depth: 1788 mm, Height: 23 mm