This USB to Serial adaptor allow your USB port devices, such as PDAs and notebooks, to connect to modem, ISDN terminal adapter, PDA, bar code scanner, label printer, and devices with DB9 SERIAL ports. Features: Conforms to USB 2.0 standard Supports RS 232 serial interface Maximum data transfer rate of over 1Mbps Can be used for PDA and modems USB extension cable also supplied / approx. 80cm long Support for following operating systems: Windows 98/2000/XP or higher Mac OS V8 or higher