Tripp Lite Keyspan High Speed USB to Serial Adapter - serial adapter - USB - RS-232 - USA-19HS - USB Adapters - CDWG.com
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SPIDER Automation™ 【USB to RS232 Converter】 High-Speed Serial DB9 male Cable 1-port Adapter, CE FCC RoHS Certified, Based on (industrial FTDI Chipset), 1 meter cable length | by SPIDER Automation : Amazon.in:
![StarTech.com 2 Port Low Profile PCI Express Serial Card - 16550 - Add 2 high-speed RS-232 serial ports to your low profile/small form factor computer with a PCI Express expansion slot - StarTech.com 2 Port Low Profile PCI Express Serial Card - 16550 - Add 2 high-speed RS-232 serial ports to your low profile/small form factor computer with a PCI Express expansion slot -](https://content.etilize.com/Original/1017465366.jpg)