10 Best Serial Cables 2025

If you're in need of a reliable cable to connect your RS-232 serial device to a USB 2.0 port, look no further than TRENDnet's USB to Serial 9-Pin Converter Cable. We reviewed and scored many products in the electronics category, with products ranging from a 7.4 score up to an impressive 9.7 score. The TU-S9 Serial Adapter from TRENDnet stole the show, boasting plug-and-play convenience and a generous 21-inch cable length. Compatible with Windows and Mac, this cable supports USB 1.1, 2.0, and 3.0. Don't settle for a subpar cable – upgrade to the TU-S9 and experience seamless connectivity in style.