Sennheiser RS120II Quick Manual page 6

Preparing the headphones for use
Opening the battery compartments
2
Turn the ear pads in the direction of the arrow until you
overcome a slight resistance and lift them off the ear
cups.
Inserting and replacing the rechargeable batteries
3
CAUTION
Only use NiMH rechargeable batteries, never
use standard batteries!
Insert the supplied rechargeable batteries. Secure the ear
pads to the ear cups.
Charge the rechargeable batteries for at least 24 hours
prior to first time use. Subsequent charging time de-
pends on the previous operating time and is up to
18 hours max.
Place the headphones on the charging cradle of the trans-
mitter. The red LED lights up, indicating that the batteries
are being charged. The LED remains lit even when the
r echargeable batteries are fully charged.
Using the RS headphone system
Switching on the audio source
4
Switch on the audio source. The transmitter automatically
switches on and off together with the audio source. The
ON/OFF LED lights up green.
Switching on the headphones/adjusting the volume
5
First, set the volume on the headphones to a low level.
Switch on the headphones and set the volume to the
desired level.
Switch off the headphones after use to avoid discharging
the batteries.
3