Introductions: Perfect for IT Administrators looking to add legacy functionality to newer notebooks, PCs and servers that lack an integrated RS232 port.Connect to monitor and control industrial/automotive and equipment.Connect to bar code scanners, receipt printers and other point of sale devices.if you need connect the rs232 device with pc, esp notebook pc, laptop pc, port pc, mini pc, etc, then you need a USB RS232 to DB9 MALE cables. Features: This product can easily achieve the computer USB interface to the universal serial port conversion between the serial port for the computer to provide fast acce, and the use of this product is equivalent to the traditional serial device into a plug and play USB devices. Support various types of single-, single- STC download, LED screen control card, MODEM, ISDN terminal adapter communication for