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2-Port Professional RS-232 USB 2.0 to Serial Adapter 5ft.
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Plugable USB 3.0 10-Port Hub with 50W Power Adapter – Plugable Technologies
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Monoprice Select Series USB-C 3-Port USB 3.0 Hub and Gigabit Ethernet Adapter - Monoprice.com
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Insignia™ 1.3' USB-to-RS-232 (DB9) PDA/Serial Adapter Cable, with Prolific Chipset Black NS-PU99501 - Best Buy
Large Selection of USB-RS232 adapters, Easy Installation and Setup of USB RS232 COM ports.
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