4-Port USB to RS-232 Serial DB9 Adapter Cable w/ FTDI Chip
4-port USB to Serial RS232 Converter
Amazon.com: StarTech.com 4 Port USB to Serial RS232 Adapter - DB9M - RS232 Extension - Serial to USB (ICUSB2324) : Electronics
4 Port USB to DB9 RS232 Serial Adapter - Serial Cards & Adapters | StarTech.com
4-Port USB to RS-232 Serial Adapter Hub
4-Port USB to RS-232 Hub - UC2324, ATEN Converters | ATEN Corporate Headquarters
USB to 4-Port RS-232 DB9 Serial Interface Adapter - Sealevel
4 Port Serial Hub USB to RS232 Adapter - Serial Cards & Adapters | StarTech.com
Manhattan USB to Serial Converter (151047)
LINDY USB to Serial Adapter - 4 Port (9 Way, RS-232) : Amazon.co.uk: Computers & Accessories
Digi Edgeport 4s - USB-to-Serial Converter - BRESSNER Technology
![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 ]")
CTF4XRS232USB (Automotive/Industry 4-port RS232 USB adapter, FT4232HL, 9-48VDC) [ USB-Hub ]
USB 4-Port Serial Adapter - USB 2.0 to DB-9 Port RS232 with FTDI CHIP - Coolgear
USB to RS232 Converter, 4 RS-232 DB9 Male - UMC-104
Serial cable adapter RS232 TTL 4 pin to USB for Arduino PL2303HX - Cablematic
Large Selection of USB-RS232 adapters, Easy Installation and Setup of USB RS232 COM ports.
4 Port Professional RS-232 USB 2.0 to Serial Adapter
4 Port USB 2.0 to Serial Adapter Hub - Serial Cards & Adapters | StarTech.com Europe
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) : Everything Else
Manhattan USB to Serial Converter (151047)
LINDY 42858 USB TO 4 PORT SERIAL CONVERTER 4xRS232 DB9 MALE PC/MAC | eBay
Delock Products 87414 Delock USB 2.0 to 4 x serial adapter
