33cm cable that converts USB to serial RS232, ideal for more serial ports or to provide the interface for computers that do not have it. No need to set IRQ, DMA or port E/S, which eliminates the typical IRQ conflicts. It installs as a standard serial port Windows and compatible with most RS232 devices. Transmission speed up to 921.6Kbps. Supports the full set of directives or modem RS232 and RS232 signals TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI and GND. Supports bidirectional communication. To add more ports in this style as needed. It has 1 RS232 port with DB9-Male connector. Compatible with Windows, Linux and Mac OS. The supplied CD includes drivers for Windows only. Length between both ends of 33cm.