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Title: 4‑Port PCI Express RS232 Serial Adapter  
Category: Electronics  
Brand: StarTech  
Description: Adds four RS232 serial ports to a single PCIe slot with an included breakout cable.  
Details: Single‑lane x1 PCIe, native single‑chip design, on‑chip 256‑byte FIFO per port, supports hardware and software flow control, compatible with Windows, Linux, and macOS.

Price is $