Four-port USB to serial RS232 converter / adapter
4 Port USB to DB9 RS232 Serial Adapter - Serial Cards & Adapters | StarTech.com
4-port USB to Serial RS232 Converter
4 Port Professional RS-232 USB 2.0 to Serial Adapter
4-Port RS-422 / 485 USB to Serial Adapter - Coolgear
4 Port Serial Hub USB to RS232 Adapter - Serial Cards & Adapters | StarTech.com
4 Port Serial RS-232 Hub w/ FTDI Chipset & RX/TX LED Indicators
USB 4-Port Serial Adapter - USB 2.0 to DB-9 Port RS232 with FTDI CHIP - Coolgear
4 Port Serial RS-232 Hub w/ FTDI Chipset & RX/TX LED Indicators
4 Port Serial Hub USB to RS232 Adapter - Serial Cards & Adapters | StarTech.com
4 Port Serial Hub USB to RS232 Adapter - Serial Cards & Adapters | StarTech.com
4-Port USB to RS-232 DB9 Serial Adapter w/ Prolific Chipset
4-Port USB to RS232 Adapter FTDI Cable - Coolgear
4 Port Professional RS-232 USB 2.0 to Serial Adapter
USB to 4-Port RS-232 DB9 Serial Interface Adapter - Sealevel
StarTech 4-Port USB to Serial Adapter Hub with COM ICUSB2324X
4 Port USB To Serial Adapter with RX/TX Indicators
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
Q Core Medical Sapphire USB to 4-Port RS232 Adapter | Bound Tree
Amazon.com: TECHTOO 4 Port Professional FTDI CHIP USB to Serial RS232 DB9 Adapter Converter Serial Cable 9-Pin Male to Male with Thumbscrews (W/Thumbscrews, 4 RS232 Port) : Electronics
USB 4-Port Serial Adapter / USB 2.0 Quad Port Serial DB-9 RS-232
Large Selection of USB-RS232 adapters, Easy Installation and Setup of USB RS232 COM ports.
4-Port RS-232 USB to Serial Adapter Data Control Box - Coolgear
4 Port USB 2.0 to Serial Adapter Hub - Serial Cards & Adapters | StarTech.com
FTDI Serial USB RS232 Adapter 4 port Din Rail Industrial - Shentek
4-Port Industrial USB to RS-232 Serial Adapter Cable
