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TRENDnet TU-S9 - serial adapter - USB - RS-232 - TU-S9 - USB Adapters - CDW.com
USB to RS232 DB9 Serial Adapter Cable - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com Italy
Insignia™ 1.3' USB-to-RS-232 (DB9) PDA/Serial Adapter Cable, with Prolific Chipset Black NS-PU99501 - Best Buy
Plugable USB to RS-232 DB9 Serial Adapter (Prolific PL2303GT Chipset) – Plugable Technologies
USB to Serial Cable - Oregon RFID
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USB 2.0 To Serial DB9 Male (9 Pin) RS232 Cable Adapter - Sabrent
2-Port Professional RS-232 USB 2.0 to Serial Adapter 5ft.
USB-to-serial adapter - Wikipedia
C2G 1.5ft USB to Serial Cable USB to DB9 Serial RS232 Cable MM Convert a DB9 RS232 serial device to USB great for PDAs digital cameras and many other peripherals - Office
Meade USB to RS-232 Serial Adapter
USB to RS232 Serial Converter -- DataPro
C2G 1.5ft USB to Serial Cable - USB to DB9 Serial RS232 Cable - M/M - 26886 - USB Adapters - CDW.com
USB/Serial Converter [FT232RL] : ID 18 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits
1 Port USB 2.0 to Serial Adapter Cable - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com Europe
USB to RS-232 DB9 1-Port Serial Interface Adapter - Sealevel
Manhattan PL-2303 USB to Serial Converter (205146)
6-in-1 USB to Serial Converter/Adapter - DFRobot
High-Speed USB-to-Serial Adapter for Windows 8 32/64-bit - U.S.Converters