RS232 to USB Converter, Industrial Multi-port Converter
Amazon.com: StarTech.com 3ft (1m) USB to Serial Cable, DB9 Male RS232 to USB Converter, Prolific IC, USB to Serial Adapter for PLC/Printer/Scanner/Switch, USB to COM Port Adapter, Windows/Mac (1P3FP-USB- SERIAL) : Electronics
RS-232 Serial to USB 2.0 CH340 Cable Adapter Converter