1 USB port to Dual RS-232 Serial Port adapter that automatically configures the new serial outputs as COM Ports. Supports full Automatic RS232 Handshaking with serial devices such as GPS, serial Modem, Printers and other office equipment. Utilizes USB Plug and Play for easy installation, no device conflicts. No power supply needed! Suitable for both commercial and industrial applications. OS Compatibility: Windows XP, 2000, 2003, CE, Vista, Windows 7, 8, 10, Windows 11 as well as Linux and Mac OS 10.X, includes driver disk.