StarTech.com 1ft (30cm) USB to Serial Adapter Cable, COM Retention, FTDI, DB9 RS232, Interchangeable DB9 Nuts/Screws, Windows/macOS/Linux - Add a DB9 RS-232 serial port to a desktop/laptop using a USB-A port; Interchangeable Nuts/Screws; DB9 nuts pre-installed; DB9 screws included for device/cable compatibility; Rugged TPE housing; Copper shielding; LED Indicators; Windows/macOS/Linux: