ByteRunner USB to Serial Adapter Adds a high speed RS-232 serial port via a USB 1.1 or 2.0 port 384 byte receive buffer & 128 byte transmit buffer Supports speeds of 300 bps to 230,400 bps Serial connector: DB-9 male connector with screw downs, 5-foot cable length Windows 98, 98SE, ME, 2000, 2003, XP, Vista & 7 compatible.