The Shure 55SH Unidyne Vocal Microphone is a modern take on the classic Unidyne from the late 1930s. This die-cast metal surrounded cardioid dynamic microphone is shock mounted and provides a clear vocal for either broadcast or in front of a singer. The used 55SH we have here has never been used and comes in its original box. There is one minor scratch in the metal on the top left front of the microphone.