4 Port Professional RS-232 USB 2.0 to Serial Adapter w/Nuts
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Tripp Lite Keyspan High Speed 4 Port USB to DB9 Serial Adapter Hub - serial adapter - USB - RS-232 x 4 - USA-49WG - USB Adapters - CDW.com
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4-Port USB to RS232 Adapter FTDI Cable - Coolgear
UC2324 - 4-Port USB-to -Serial RS-232 Hub
USB 4-Port Serial Adapter / USB 2.0 Quad Port Serial DB-9 RS-232
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USB 4-Port Serial Adapter - USB 2.0 to DB-9 Port RS232 with FTDI CHIP - Coolgear
4-Port RS-232 USB to Serial Adapter Data Control Box - Coolgear
Delock Products 87414 Delock USB 2.0 to 4 x serial adapter
4-Port USB to Serial RS232 Hub | TRENDnet - TRENDnet TU-S4
PROVANTAGE: StarTech.com ICUSB2324 4 Port USB to Serial RS232 Adapter Hub - DB89
4-port USB 2.0 to 4X RS232 serial cable splitter converter ZE552A(FTDI Chipset+win 10 supported) - AliExpress
StarTech 4-Port USB to Serial Adapter Hub with COM ICUSB2324X
Shop | StarTech.com 4 Port Serial Hub USB to RS232/RS485/RS422 Adapter - Industrial USB 2.0 to DB9 Serial Converter Hub - IP30 Rated - Din Rail Mountable Metal Serial Hub - 15kV
4 Port Serial Hub USB to RS232 Adapter - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com
USB to 4-Port RS-232 DB9 Serial Interface Adapter - Sealevel
4-Port USB to RS-232 Hub - UC2324, ATEN Converters | ATEN U.S.A.
4-Port USB to RS-232 Serial Adapter Hub
4-Port USB DB-9 Serial Adapter Solution for Windows Operating Systems
USB to 4-Port RS-232 RJ45 Serial Interface, Bus-Powered - Sealevel
4 Port USB Type A Male to Serial Adapter Hub
4 Port USB to RS232 Serial Adapter Hub - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com Europe
