2-port PCI Express RS232 Serial Host Controller Adapter Card - Add two high performance RS232 serial ports (DB9) to your low or full-profile computer, through a PCI Express slot The PCI Express serial card lets you turn a PCI Express slot into 2 RS232 (DB9) serial ports. Based on a native single chip design (no bridge chip), this 2-port serial adapter card allows you to harness the full capability offered by PCI Express (PCIe). The RS232 Serial Adapter Card (PEX2S553) is compatible with a broad range of operating systems including Windows and Linux Kernel 2.6.11 to 4.11.x. Plus, the serial card includes an optional half-height/low profile bracket that allows the card to be installed in any PCI Express slot, regardless of the size of the computer case. Applications ¦ Self-service automated machines and kiosks to control serial devices such as scales, touchscreens, magnetic card readers, bar code scanners, receipt printers, label printers ¦ POS retail applications in grocery stores, and any other retail store to control keyboards, cash drawers, receipt printers, card readers / card swipes, scales, and elevated displays on poles ¦ Bank teller workstations in either full profile or low profile versions to control their serial devices such as cash drawers, card readers / card swipes, printers, keypads / pinpads, pen pads ¦ Standard ATM automated teller machines to control keypads, receipt printer, card readers / card swipes, touchscreen LCD's, camera control, etc. ¦ Used to control multiple surveillance / security cameras in a parking structure, office building, etc.Any questions,Please feel free contact us,we will provide you with high quality after-sales service. For standard/low profile desktop/servers w/ uses in point of sale terminals, PLCs, control/automation in factories, scientific sensors, medical equipment, scanner, oscilloscope. Standard profile bracket installed, optional dual low-profile brackets included. Compliant with PCI Express 1.0a specification, compatible with 1x, 2x, 4x, 8x, and 16x PCIe bus. Ideal for a Wide Range of Applications Including Manufacturing Equipment, POS Equipment, Security Devices such as Surveillance Cameras, Card Readers or Access Panels, and Environment or Building Control Systems.