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