Sennheiser Set 810 S Bedienungsanleitung Seite 30

Only use one of the two audio inputs on the transmitter (MIC or LINE).
Connect the power cable to the POWER socket on the transmitter. Plug
the power supply into a household electrical outlet.
Pull the power supply unit out of the electrical outlet when the unit will not
be used for extended periods of time.
4 SET 810 S