StarTech.com USB to RS232 Serial Adapter Cable - M/M. This adapter cable allows you to connect RS232 serial devices to your computer via a USB port. It features a USB Type-A connector on one end and a DB9 male connector on the other, making it compatible with a wide range of serial peripherals. The cable is designed for reliable data transfer and is ideal for connecting modems, POS systems, industrial equipment, and more.