Our line of ExpressCard communications cards can expand a laptop's capabilities while taking up minimal system resources. This line of ExpressCard cards is one of the most complete and robust in the marketplace providing a variety of noteworthy features including serial cards with the industry's fastest data rates, a unique auto-toggle feature for automatic hardware control of RS-422/485 dataflow, deep 64-byte FIFOs, lightening fast and secure synchronous serial communication, detachable cable or built-in port options, true EPP parallel port functionality, low power requirements, and an all encompassing driver set supporting Windows 2000, XP, Server 2003, and Vista.