The Astatic Model 636L Noise-Canceling Dynamic Microphone is ideal for CB, amateur radio and SSB communications. Show your national pride with the American red, white and blue edition. The mic comes with Astatic's heavy-duty, 7.5' metal cord, and has a tailored frequency response system that provides maximum talk power. The noise-canceling feature effectively reduces wind and vehicle noise, while the durable construction ensures the mic will survive years of use. Compatible with all four-pin CB radios, including, Cobra, Uniden and Galaxy models.