Sennheiser 300 series Instruction Manual page 44

Using the EM 300-500 G4
Displays on the EM 300-500 G4 display panel
Status information such as reception quality, battery status, audio level,
etc. is displayed on the home screen of the display panel. See "Home
screen".
The display panel also displays the operating menu, which you can use to
configure all of the settings. See "Setting options in the menu".
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