The USB to RS232 serial port adapter provides the connection between USB and the traditional RS232 serial port. The adapter is designed for connections to cellular phone PDA digital cameras modems or ISDN terminal adapters through your USB port. Since the adapter uses no IRQs it is perfect for you to connect your serial devices attached to your PC. And there comes with a useful USB extension cable. - USB specification 2.0 compliant - Supports RS232 serial interface - Available for USB port - Supports over 1Mbps data transfer rate - Supports windows 98/ME/2000/XP - Comes with one USB 2.0 cable http://m5.img.dxcdn.com/CDDriver/CD/sku.5859.rar