Sennheiser SK 5012 Instrucciones Para El Uso página 27

"Low battery" indication
The transmitter has an
integrated voltage converter
which ensures constant
operating conditions
until the batteries are
completely discharged.
When the remaining
operating time is approx.
30 minutes, the LED starts
blinking periodically.
As the batteries discharge,
the blinking of the LED
accelerates.
!
Note
If the transmitter is powered by rechargeable batteries,
the LED only starts blinking shortly before the batteries
are completely discharged.
SK 5012 - 27