Shure Dynamic Microphone BETA57A Works perfectly. I believe it's in excellent condition as it's hardly been used. Personal Opinion: Compared to the standard SM58 from the same manufacturer, the sound clarity and stability are better. Compared to the Beta 58, the 57 has smoother high frequencies. The sound quality is about the same level as the Sennheiser e935 in the same price range, but the Beta 57 gives a more natural sound. Thank you for looking.