The Shure 577B is a handheld dynamic microphone designed for communications and paging applications that require highly intelligible, low noise output.
From amateur radio to helicopter news and traffic reports, the Shure 577B is your microphone choice for mobile communications. The 577B offers total noise reduction, making it suitable for public address and paging systems in noisy areas, through shaped frequency response, directionality, and distant sound discrimination. The mic operates on the pressure-gradient principle and has two sound entry ports spaced a small distance apart.