ADD LEGACY FUNCTIONALITY: The USB to VGA adapter lets you connect DB9 RS232 serial devices to your device through an available USB port, as though the computer offered a DB9M connector. UNIQUE CONVERTER CHIP: Unlike typical USB to serial cables where the conversion takes place at the DB9 end, the StarTech.com USB to serial RS232 adapter features a converter chip on the USB end. OVERCOME DISTANCE LIMITATIONS: Converting at the USB source overcomes the 15ft. technical limit of USB cables this USB to RS232 adapter cable allows for a much greater serial DB-9 extension cable. MAXIMUM COMPATIBILITY: Simple to install and use, this USB serial adapter is a cost-effective solution that bridges the compatibility gap between modern computers and legacy serial peripherals. THE STARTECH.COM ADVANTAGE: StarTech.com offers a lifetime warranty and free lifetime technical support on this USB to VGA adapter and has been the choice of IT professionals for over 30 years.