Replacing the microphone module
You can find a list of the recommended microphone modules for the handheld transmitter under “Microphones and cables”.
To change the microphone module:
Unscrew the microphone module.Screw the desired microphone module on.► 
Do not touch the wireless microphone contacts or the microphone module contacts. If you touch the contacts, they may become dirty or bent.
When you unscrew the microphone module during operation, mute is automatically activated. MUTE appears in the display panel. When you screw the microphone module back on, mute is deactivated.