Bus Interface: PCI bus 32 bit Supports up to 2 x 16550 Fast Uart serial port Easy Plug and Play installation Automatically selects IRQ & IO address Supports IRQ sharing Built in 16C550 compatible UART with 16byte transmit-receive FIFO Serial transmission rate up to 115200bps. Multi - card capability -allow for upgrade with additional serial or parallel cards Low profile version available OS Supports: Windows 98SE/ME/NT4.0/2000/XP, DOS, Vista