Connect devices with a 9-pin RS-232 serial port, such as PDUs, network switches and console servers, to the USB-A port on your computer or laptop. This USB-to-Serial cable (M/M) connects a 9-pin RS-232 (DB9) serial device to a USB-A port on your desktop computer or laptop. It connects modems, PDUs, network switches, console servers and other serial devices at data transfer speeds up to 230 Kbps, which is twice as fast as a built-in serial port. The compact five-foot (1. 5-meter) cable fits easily inside a backpack or laptop bag for use almost anywhere. The U209-000-R blocks disruptive EMI (electromagnetic interference) and RFI (radio frequency interference) line noise that can disturb your network equipment and inflict hardware damage or data loss. Premium double-shielding eliminates crosstalk and helps your connected components perform better and last longer. This RS-232 cable requires no external power source and supports remote wake-up and power management. It works with most major operating systems, including Windows 2000 through 11, macOS 10. 6 through 12. 4 and Linux Redhat 7. 3, 8. 0 and 9. 0. Supports data transfer rates up to 250 Kbps2x the speed of a built-in serial port. Premium double-shielded cable eliminates crosstalk and reduces EMI/RFI line noise. Portable design fits comfortably inside a backpack or laptop bag. Compatible with Windows, macOS and Linux operating systems. Plug-and-play with no external power required for easy, immediate installation. 3-year limited warranty. TripLIte 5 ft. (1. 5 m) USB-A to RS-232 (DB9) Serial Adapter Cable (M/M).