Sennheiser SKM 1072-U Notice D'emploi page 14

Muting the microphone (N.B.: This operation does not switch off the
transmitter.)
ON
Cleaning the sound inlet basket
Sennheiser electromic KG
D-30900 Wedemark
OFF
LOCKED
ON
Telefon 05130/600-0
Telefax 05130/6312
13