The Shure BETA 87A is a premium supercardioid handheld electret condenser vocal microphone with an exceptionally smooth frequency response and high sound pressure level (SPL) capability. Used for professional sound reinforcement, broadcasting and studio recording applications, the BETA 87A combines excellent performance with the ruggedness needed for touring and field production. The Shure Beta 87A is a premium quality, high quality electret condenser vocal microphone with an exceptionally smooth frequency response and high sound pressure (SPL) capability. Used for professional studio recording, broadcast and reinforcement applications, the Beta 87A combines excellent performance with the ruggedness needed for production and field production..PZA MORE SPECS