Sennheiser MAS 133 Inline Logic Box for Integrated Microphone SystemsThe MAS 133 is a versatile XLR inline logic box for integrated microphone solutions. The MAS 133 features (2) XLR 3 for audio and (1) XLR 5 for control via the MAS 1 mic activation button. Programmable operation modes include On, On Off, PTT, and PTM. TTL logic enables integration with media or camera control systems. Programmable Microphone Modes: On On Off Push to talk Push to mute What's in the box? MAS 133 Mounting hardware Quick guide