Drivers automatically install to Windows 7 and newer versions and macOS 10.15 and above. Copper shielding minimizes Electromagnetic and Radio Frequency Interference (EMI and RFI). INTERCHANGEABLE NUTS & SCREWS: Secure the adapter to a serial device using the pre-installed DB9 screws, or install the included DB9 Nuts for compatibility with serial peripheral devices/cables; Add a DB9 RS-232 port to a computer, using a USB-A port.
eBay