WiredCom USB 2.0 to RS-232 Serial Cable for Printer, Projector, Scanner, Router, Modem USB Adapter  (Blue)

USB serial converter or RS232 adapter is a small electronic device that can convert a USB signal to serial RS232 data signals. RS232 is the type of signal which is in many older PCs and is referred to as a serial COM port. The USB to DB9 provides a connection between an available USB port and the more traditional RS-232 serial port found on many devices. This adapter is designed for connections to cellular phones, PDAs, digital cameras, modems, or ISDN terminal adapters through your USB port. Simply plug your device into the adapter and the adapter into your PC or Mac. COM ports and Baud rates can be modified to the desired setup.