Bytecc BT-DB925 USB to Serial Cable Adapter - 5.83 ft Serial Data Transfer Cable - Type A Male USB - DB-9 Male Serial BT-DB925

The USB to DB9 Serial Adapter provides the connection between USB and the traditional RS-232 serial port. The adapter is designed for connections to Cellular phone, PDA, digital cameras, modems, or ISDN terminal adapters through your USB port with over 1Mbps data transfer rate. Since the adapter uses no IRQs, it is perfect if you need many serial devices attached to your PC.