This universal PCI card from Brainboxes provides 1 industry standard 9-pin RS232 serial COM port in a single PCI slot and is available in either Standard Profile or Low Profile form factor. Low Profile is the industry standard small form factor design for PCI. Universal PCI is fully compatible with both 3.3volt and 5volt PCI slots, protecting your investment into the future. Drivers for all popular operating systems are included. The card is covered by Brainboxes lifetime warranty and support.