Noise Canceling Dynamic Microphone. Ideal for CB, amateur radio and SSB communications. Heavy duty super-flex stainless steel cord 7 1/2 feet. It fits all 4-pin Cobra, Uniden and Galaxy radios. Famous 636L dynamic noise canceling element assures clarity in noisy conditions,and effectively reduces wind and vehicle noise. Astatic's tailored frequency response provides maximum talk power. Durable construction is combined with a polyurethane-coated steel grill, and soft vinyl lip guard. Chrome Plated Exterior Housing.