4-Port USB to RS-232 DB9 Serial Adapter w/ Prolific Chipset
StarTech.com USB to RS232/RS485/RS422 Industrial 4 Port Serial Hub Adapter - USB to Serial Converter - ICUSB234854I - USB Adapters - CDW.com
4 Port Serial RS-232 Hub w/ FTDI Chipset & RX/TX LED Indicators
4 Port Professional RS-232 USB 2.0 to Serial Adapter w/Nuts
4 Port USB to DB9 RS232 Serial Adapter - Serial Cards & Adapters | StarTech.com
4 Port USB 2.0 to Serial Adapter Hub - Serial Cards & Adapters | StarTech.com
USB-COM232-PLUS4 - Ftdi - Adapter Board, FTDI Chip, USB to RS232
4 Port USB to DB9 RS232 Serial Adapter - Serial Cards & Adapters | StarTech.com Europe
USB 4-Port Serial Adapter - USB 2.0 to DB-9 Port RS232 with FTDI CHIP - Coolgear
4 Port Serial Hub USB to RS232 Adapter - Serial Cards & Adapters | StarTech.com
4-Port USB to RS232 Converter DB9 | Black Box
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 RS-422 / 485 USB to Serial Adapter - Coolgear
StarTech.com 3ft USB to Serial Cable USB to Serial Port Adapter RS232 DB9 Male to USB Prolific IC - 1P3FPC-USB-SERIAL - USB Adapters - CDW.com
4-port USB to Serial RS232 Converter
4-Port Industrial USB to RS-232 Serial Adapter Cable
4-Port USB to RS232 Adapter FTDI Cable - Coolgear
Amazon.com: StarTech.com 4 Port USB to Serial RS232 Adapter - DB9M - RS232 Extension - Serial to USB (ICUSB2324) : Electronics
4-Port USB to RS-232 Hub - UC2324, ATEN Converters | ATEN Corporate Headquarters
4 Port Professional RS-232 USB 2.0 to Serial Adapter
Amazon.com: StarTech.com 4 Port USB to Serial RS232 Adapter - Wall Mount - Din Rail - COM Port Retention - FTDI USB to DB9 RS232 Hub (ICUSB2324I) : Electronics
4-Port USB DB-9 Serial Adapter Solution for Windows Operating Systems
Amazon.com: USB 2.0 to 4 Ports Serial RS-232 COM DB9 Male Adapter Cable FT232 USB-4x RS232 : Electronics
4-Port USB to RS-232 Serial Adapter Hub
![CTF4XRS232USB (Automotive/Industry 4-port RS232 USB adapter, FT4232HL, 9-48VDC) [ USB-Hub ]](https://www.cartft.com/image_db/CTF4XRS232USB.jpg "CTF4XRS232USB (Automotive/Industry 4-port RS232 USB adapter, FT4232HL, 9-48VDC) [ USB-Hub ]")