Sennheiser EK 3253 Instructions For Use Manual page 9

Red LED lit up:
Red LED flashing: The batteries are/the accupack is going flat
In addition, the 4-step battery status display
panel provides information on the remaining battery/accupack
capacity:
3 segments:
2 segments:
1 segment:
Battery icon flashing:
Modulation display of the received transmitter
The level display for audio signal "AF" shows the modulation of
the received transmitter. When the transmitter's audio input
level is excessively high, the level display for audio signal "AF"
shows full deflection.
"MUTE" display
The "MUTE" display
RF signal of the received transmitter is too weak.
The receiver is switched on and the capacity
of the batteries/accupack is sufficient.
(LOW BAT)!
appears on the display panel when the
capacity approx. 100 %
capacity approx. 70 %
capacity approx. 30 %
LOW BAT
on the display
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