Connect a RS-232 serial device such as a modem to a USB port, Easy installation with universal plug-and-play, Supports multiple operating systems , USB 1.1 compliant, Supports RS-232 serial interface, Supports up to 500kbps data transfer rate, Detects USB suspend condition, Windows and Mac compliant, Install as a standard Windows COM port, full RS-232 modem control signals, RS-232 data signals; TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI, GND, Supports BUS power, no external power adapter required, 2-year limited warranty