“StarTech.com USB to Serial Adapter – 2 Port – Wall Mount – COM Port Retention – Texas Instruments – USB to Serial RS232 Adapter – Add 2 serial RS-232 ports to any laptop or computer with a USB port – USB to Serial – USB to RS232 – USB to DB9 – USB to serial Adapter – USB to serial port ADAPTER HUB W/ COM RETENTION” has been added to your cart. View cart