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4 Port USB Type-C To Serial Adapter with Per port LED Rx / TX
USB 4-Port Serial Adapter / USB 2.0 Quad Port Serial DB-9 RS-232
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Four-port USB to serial RS232 converter / adapter
4-Port USB DB-9 Serial Adapter Solution for Windows Operating Systems
4-port Usb 2.0 To 4x Rs232 Serial Cable Splitter Converter Ze552a(ftdi Chipset+win 10 Supported) - Pc Hardware Cables & Adapters - AliExpress
StarTech.com USB to RS232/RS485/RS422 Industrial 4 Port Serial Hub Adapter - USB to Serial Converter - ICUSB234854I - USB Adapters - CDW.com
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4 Port Professional RS-232 USB 2.0 to Serial Adapter
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4-Port USB to RS-232 Serial Adapter Hub
FTDI Serial USB RS232 Adapter 4 port Din Rail Industrial - Shentek
4 Port Professional RS-232 USB 2.0 to Serial Adapter
4 Port USB to Serial Adapter - USB-B to DB9 RS485 RS422 | Eaton
4-Port USB-A to Serial DB9 Adapter, Keyspan | Eaton
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USB 4-Port Serial Adapter - USB 2.0 to DB-9 Port RS232 with FTDI CHIP - Coolgear
USB to 4-Port RS-232 DB9 Serial Interface Adapter - Sealevel
Large Selection of USB-RS232 adapters, Easy Installation and Setup of USB RS232 COM ports.
StarTech 4-Port USB to Serial Adapter Hub with COM ICUSB2324X
4-port USB to Serial RS232 Converter
4-Port RS-422 / 485 USB to Serial Adapter - Coolgear
StarTech.com USB to DB9 RS232/RS422/RS485 4-port serial adapter hub - IP30 - Serial StarTech.com on LDLC
4-Port USB to RS-232 Hub - UC2324, ATEN Converters | ATEN Corporate Headquarters
