Gearmo RS-232 to USB Adapter - 4 Port USB

Gearmo USB-C 2.0 to Serial RS-232 Adapter

UOTEK UT-8801 - USB type A male to RS232 DB9 male 1-port +/-15KV electrostatic protection

rayihni USB to serial adapter - Type A USB DB9

Moxa UPort 1150I - 1 Port USB-to-Serial 2 KV

Sabrent USB 2.0 to Serial Converter Cable - 9 Pin DB 9 RS 232

rayihni USB to RS485 Converter - USB 2.0 PL2303

Gearmo USB to Serial RS-232 Adapter - LED Indicators FTDI Chipset

rayihni USB TO RS232 ADAPTER

rayihni RS232 TO RS485 SERIAL DATA COMMUNICATION CONVERTER ADAPTER - DB9 FEMALE 4-PIN TERMINAL BLOCK

DTech USB to RS485 Adapter