Volume control
Inserting / Changing the Battery
You require one 1.4 V battery of the PR41(A312)
type. This is supplied with the device.
1. Open the battery compartment by sliding it up out of the
device with your fi nger nail.
2. Insert a battery (PR41(A312) type). Pay attention to the
correct polarity (+/–). The positive pole must be facing
upwards!
3. Close the battery compartment again by sliding it back
into the device. Make sure that the compartment is
completely closed.
Always replace the battery when the noises which are trans-
mitted start losing volume or can no longer be heard at all or
are distorted.
Battery compartment
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