Serial Port Expansion The Dual-Port USB Serial Adapter adds two RS-232 serial DB/DE-9 (male) connectors to a desktop or laptop via a single USB Type-A port. Secure the adapter to a serial device, using pre-installed and removable slotted DB-9 nuts or install the included DB-9 thumbscrews for compatibility with other serial peripheral devices or cables.
The Startech 2Ft/60Cm 2-Port USB to Serial Adapter Cable with Retainer-FTDI DB9 RS23 is ideal for anyone needing a compact, high-quality USB-to-serial adapter with a durable DB9 connector, perfect for applications with limited space or those requiring additional connection security.