1. Convenient Use: The PCIE expansion card allows you to add 2 RS232 BD9 serial ports to your desktop or industrial equipment via the motherboard's PCI Express slot.
2. Seamless Connectivity: The PCIe serial expansion card easily connects to DB9 serial port devices like POS systems, industrial control equipment, security systems, logistics management devices, scanners, and printers.
3. Universal Compatibility: The full size bracket on this expansion card fits standard PCs, with 2 slim brackets included for slim PCs. Supports PCIe x1 interface for X1, X4, X8, X16 slots.
4. Easy Installation: Ensure your PC has an available PCIe slot; slim PC users may need to switch to slim brackets manually. Install correct drivers from your desktop that fit for Mini-CD.
5. Applicable Operating System: The PCI Express expansion card adapter supports for DOS, supports for ​ 98 Me NT4.0 2000 Vista 7 8 Server 2003 2008, supports for Linux operating systems.

Spec:
Item Type: PCIe Serial Expansion Card
Material: Metal+PCB
Applicable Slot: Support for PCI-E x4, x8, x16 slots

How to Use:
Install and play

Package List:
1 x PCIe Serial Expansion Card
1 x CD