2 Port USB to RS232 Serial Adapter Cable - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com
QVS USB 2.0 (Type-A) Male to DB-9 RS-232 Serial Male Adapter Cable 6 ft. - Black - Micro Center
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2-Port PCI RS232 Serial Adapter Card DB9 - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com
HP Z2 2nd Serial Port Adapter - 141K8AA - Laptop Chargers & Adapters - CDW.com
Manhattan USB to Serial Converter (174947)
HP 2nd Serial Port Standard Adapter NEW Bulk 482439-001 w/ 16-in Cable 389023-002
Serial Wi-Fi Adapter - RS232 Wi-Fi
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USB to 2-Port Software-Configurable DB9 Serial Interface Adapter - Sealevel
USB 2.0 A-Male to Dual DB9-Male Serial Adapter - Micro Connectors, Inc.
Insignia™ 1.3' USB-to-RS-232 (DB9) PDA/Serial Adapter Cable, with Prolific Chipset Black NS-PU99501 - Best Buy
2 Port USB 2.0 to Serial Adapter Hub - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com Europe
QVS DB9 Female to DB9 Male Splitter Cable (8") CC317Y B&H Photo
USB to 2-Port Software-Configurable DB9 Serial Interface Adapter - Sealevel
Dual port Ethernet to Serial Converter - U.S. Converters LLC
HP 2nd Serial Port Adapter with Bracket - Hardware Nation
RS232/422/485 to USB 2.0 Serial Adapter Combo - Coolgear
PCI-E serial port card pcie to COM9 pin RS232 Industrial serial port Expansion card Two serial ports - AliExpress
