Four-port USB to serial RS232 converter / adapter
USB to 4-Port RS-232, RS-485 RJ45 VersaCom Serial Interface, Bus-Powered - Sealevel
4 Port USB to DB9 RS232 Serial Adapter - Serial Cards & Adapters | StarTech.com
3ft USB to Serial Cable/RS232 Adapter - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com Belgium
Keyspan USB 4-Port Serial Adapter - Midwest MicroSystems LLC
USB 4-Port Serial Adapter / USB 2.0 Quad Port Serial DB-9 RS-232
Startech 4 Port USB 2.0 to Serial Adapter Hub Black | Techinn
Q Core Medical Sapphire USB to 4-Port RS232 Adapter | Bound Tree
StarTech.com USB to RS232/RS485/RS422 Industrial 4 Port Serial Hub Adapter - USB to Serial Converter - ICUSB234854I - USB Adapters - CDW.com
4-Port USB to RS232 Adapter FTDI Cable - Coolgear
4-Port USB DB-9 Serial Adapter Solution for Windows Operating Systems
4 Port Serial Hub USB to RS232 Adapter - Serial Cards & Adapters | StarTech.com
4-Port USB to RS-232 Serial Adapter Hub
4 Port USB Type-C To Serial Adapter with Per port LED Rx / TX Indicators
4 Port Professional RS-232 USB 2.0 to Serial Adapter w/Nuts
4-Port USB to RS-232 DB9 Serial Adapter w/ Prolific Chipset
FTDI Serial USB RS232 Adapter 4 port Din Rail Industrial - Shentek
USB to 4-Port RS-232 DB9 Serial Interface Adapter - Sealevel
Amazon.com: Gearmo 4 Port USB to Serial RS232 Adapter FTDI Chipset, Supports Win 11, 10, 8, 7, Linux, Mac w/ESD and Surge Protection : Electronics
StarTech.com ICUSB2324 USB to Serial Adapter Hub - 4 Port - Bus Powered - DB9 (9-pin) - USB Serial - FTDI USB to Serial Adapter USB Converters - Newegg.com
USB to 4 PIN Serial RS232 PORT FTDI Chipset Adapter
4-Port USB-A to Serial DB9 Adapter, Keyspan | Eaton
