Brainboxes Universal 3 + 1 Port RS232 Streamline interface cards/adapter

Universal PCI card provides 3 or 4 industry standard 9 Pin RS232 serial COM ports in a single PCI slot. The fourth port is a flying lead header which can be either connected to an available slot or knockout
on the chassis.

No additional external cabling neccessary because all four 9 Pin ports are built into card; streamline connectivity.
Universal PCI is fully compatible with both 3.3Volt and 5Volt PCI slots; protecting your investment into the future.