Shure MC20AJ is a small controlled magnetic microphone that is ideally suited for use in small, compact vacuum tube and transistor devices. It is also perfect for use with amplifiers, transmitters, dictating equipment, hearing aids, and all equipment where small size and weight are very important.

The MC20AJ has an excellent sensitivity in the frequency range most important for voice transmission, making it a great choice for use in recording and broadcasting applications. It also has a rugged, magnetic construction that makes it immune to varying conditions of heat and humidity, ensuring reliable performance in even the most demanding environments.