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USB 2.0 A-Male to Dual DB9-Male Serial Adapter - Micro Connectors, Inc.
Multi-Port Industrial USB to Serial Converter with Isolation
10ft. USB 4 Port Serial Adapter USB 2.0 Quad Port Serial DB-9 RS-232
4-Port USB to RS232 Adapter FTDI Cable - Coolgear
Multi-2/USB RS232 | USB Device | Wired | 시스템베이스
