The USB to RS232 DB9 serial male cable adds a COM port to your computer via the USB interface, so you can make the most of your existing equipment or free up your existing computer serial connector. | The USB to serial adapter is designed for connecting serial devices such as DB9 equipped cash registers, PLAMs, CNC machines, temperature control devices, routers, ISDN terminal adapters, digital cameras, scanners, label writers, modems, cameras, card readers, PDAs and other serial device connections. Note: It is not compatible with cutting plotters and microcontrollers. | The DB9 serial cable to USB adapter uses the CH340 premium processor chip and supports 32 and 64 bit Windows 10/8/7/Vista/XP/Mac OS and above. Drive-free requires automatic update with network access. Plug and Play. | Tinned copper conductors and triple shielding ensure optimum data transfer rates. USB bus powered, no external power adapter required, supports your widest range of operating system compatibility and reliable data communication. | The USB to RS232 adapter interface is a 9-pin RS232 (9-wire pins 1-9: DCD, RXD, TXD, DTR, GND, DSR, RTS, CTS, RI) male connector, please ensure that your serial device has a 9-pin female port before purchasing.