StarTech.com USB to RS232 DB9 Serial Adapter with Detachable 6ft USB Cable - ICUSB232D - -
USB to RS232 Converter - 6ft - CAB-11304 - SparkFun Electronics
Multi USB-RS232-RS485-TTL Converter - DFRobot
Amazon.com: USB to RS232 Adapter (FTDI Chipset), CableCreation 3 Feet RS-232 Male DB9 Serial Converter Cable for Windows 10, 8.1, 8,7, Vista, XP, 2000, Linux, Mac OS X 10.6 and Above,1M / Black : Electronics
USB to RS232 DB9/DB25 Serial Adapter - Serial Cards & Adapters
iOptron USB to RS232 Converter for iOptron Mounts 8435 B&H Photo
USB to Dual RS232 Adapter / Converter – CommFront
USB RS232 Serial to DB9 Female Adapter Converter CP2102 Null Modem or Terminal device Cable support win7/8/10/xp/android/mac etc|Computer Cables & Connectors| - AliExpress
USB to RS232 Adapter / Converter – CommFront
USB to Null Modem (Cross Wired) RS232 Serial Adapter FTDI ft232r USB RS232 to DB9 Female Adapter Cable PC Control TV Cable|Computer Cables & Connectors| - AliExpress
Sabrent USB 2.0 To Serial DB9 Male (9 Pin) RS232 Cable Adapter 1 ft Cable (CB-RS232) | CB-RS232