Sennheiser SK 5212 Instructions For Use Manual page 8

The LED display
The red LED
transmitter.
Red LED lights up normally: The transmitter is switched on and the
Red LED is flashing:
Red LED lights up brightly: The transmitter is fully modulated (PEAK).
provides information on the operating state of the
capacitiy of the battery is sufficient (ON).
The battery is going flat
(LOW BATT)!
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