4-Port USB to RS-232 DB9 Serial Adapter w/ Prolific Chipset
USB to 4-Port RS-232 DB9 Serial Interface Adapter - Sealevel
4-Port USB-A to Serial DB9 Adapter, Keyspan | Eaton
4-port USB to Serial RS232 Converter
4-port USB 2.0 to 4X RS232 serial cable splitter converter ZE552A(FTDI Chipset+win 10 supported)
Ftdi Chip 4 Port Usb To Serial Rs232 Db9 Adapter Cable - Pc Hardware Cables & Adapters - AliExpress
4 Port Professional RS-232 USB 2.0 to Serial Adapter w/Nuts
Four-port USB to serial RS232 converter / adapter
4 Port Serial Hub USB to RS232 Adapter - Serial Cards & Adapters | StarTech.com
FTDI Serial USB RS232 Adapter 4 port Din Rail Industrial - Shentek
Keyspan USB 4-Port Serial Adapter - serial adapter - 4 ports - USA-49WG
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
USB 4-Port Serial Adapter - USB 2.0 to DB-9 Port RS232 with FTDI CHIP - Coolgear
Keyspan USB 4-Port Serial Adapter - Midwest MicroSystems LLC
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
4 Port Professional RS-232 USB 2.0 to Serial Adapter
USB 2 to Industrial 4-Port RS232-422-485 Serial TB Adapter - Coolgear
3ft USB to Serial Cable/RS232 Adapter - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com Belgium
4 Port USB Type-C To Serial Adapter with Per port LED Rx / TX Indicators
USB to 4-Port RS-232, RS-485 RJ45 VersaCom Serial Interface, Bus-Powered - Sealevel
4 Port USB To Serial Adapter with RX/TX Indicators
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 RS232 Adapter FTDI Cable - Coolgear
