PTC High Speed USB 2.0 to Serial RS-232 DB-9 Converter OS SUPPORT - Supports Windows 10, 8, 7, Vista, 2000, XP, 98, Apple MAC OS8 or higher, Linux 2.4.0 and later, OpenBSD 2.9 and later & FreeBSD 4.7 and later USB 2.0 TO RS-232 - Installed as a standard Windows COM ports, Full RS-232 modem control signals, RS-232 data signals; TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI, GND CONNECT SERIAL DB-9 DEVICES - Provides instant connectivity with modems, ISDN terminal adapter, PDA, bar code scanner, label printer, and devices with DB-9 SERIAL ports FTDI CHIPSET - Built with FTDI chipset; Powered by USB port EXTENSION CABLE INCLUDED - Package includes a 3ft USB male to female extension cable