Sennheiser 505618 MAS 1 B Microphone activation button (when paired with MAS

Sennheiser 505618 Microphone activation button (when paired with MAS 133 inline switchbox) for any XLR-attached microphone with 5-pin XLR-M. Features programmable on, off, PTT and PTM modes and bi-color LED ring for status indication. Includes (2)