SIIG 8-Port USB to RS-232 Serial Adapter Hub (JU-SC0211-S1) Instantly adds eight 9-pin RS-232 serial ports to system via a USB port Industrial metal housing provides durability and efficient cooling for long life and dependable performance Easy to install and USB plug-n-play supported USB cable and power adapter included Supports Windows 8 (32-/64-bit) / 7 (32-/64-bit) / Vista (32-/64-bit) / XP (32-/64-bit) / Server 2003 & 2008 (32-/64-bit) / Server 2008 R2 / 2000 Works with Linux but not supported (tested with Kernel 2.6.32)