Economy USB2-232 cable.The USB 2.0 to Serial converter is an intelligent, stackable expansion module that connects to a PC USB port or USB hub, providing one high speed RS232 serial port.The USB2-232 features easy connectivity for traditional serial devices. Please Note: Some Serial Devices do not like the USB Serial Convertors as they are not classed as 'True Serial Ports' if you require something more sohpisticated then you may need to consider a PCMCIA to Serial Convertor, if you are using this on your laptop or a PCI Serial Port Card for a desktop Computer.