Simultaneously connect two RS-232 serial devices to your USB (Universal Serial Bus) ready PC or Mac with this hard-wearing converter Supports standard serial devices USB 1.1 Compliant Easy plug & play installation Connectors: USB (Universal Serial Bus) Mini-B Female to 2 x 9 Way D Serial Male, supplied with 80cm USB (Universal Serial Bus) A/ Mini-B Cable ESD Protection up to 15k V LED Status Indicators High Quality FTDI Chipset Powered from USB (Universal Serial Bus) Bus with no external power supply required Compatible with Windows XP/ Vista/ Server 2003/ Server 2008/7 (32 & 64 Bit), Mac OS X & Linux 2.4 & higher Warranty: 2 years