Wide Application: PCIe combo serial parallel expansion card for standard desktops, servers, POS, PLCs, factory control, automation, scientific sensors, scanners, etc. Combo Expansion: Add 2 high-speed DP9-pin RS232 serial ports and one DP25-pin parallel port to your PC via the MINI PCI E expansion slot. Thin Bracket: DP25-pin baffle cable with parallel port and DP9-pin RS232 serial baffle cable with high and short iron pieces, suitable for 2U chassis, supports Windows and Linux. Number of Interfaces: PCI express to printer LPT port expansion card has 2 DB9 pin RS232 serial ports, 1 DP25 pin parallel port. Thickened Gold-Plated Pin: Serial PCIe card adapter adopts immersion gold process, which has good conductivity and anti-oxidation, ensuring good contact and improving data transmission rate. Item Type: Mini PCIe Combo Serial Parallel Expansion Card Product Material: PCB Number of Interfaces: 2 x DB9 Pin RS232 Serial Port, 1 x DP25 Pin Parallel Port Applicable Slot: Mini Pci E (not for MSATA or Mini Pci E Wireless Internet Card Slot) Bus Bandwidth: Approx. 6gb/s Your 100% satisfaction is our top priority. We are committed to providing you with the best service. If you encounter any issues after receiving the product, such as damage or incorrect quantity, please contact us immediately for the best solution!