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4.6 Power supply / recharge
The devices are equipped with a rechargeable
lithium-ion battery of 3,7 V / 1100 mAh.
To charge the batteries, connect the recharger
with the USB power supply and place the de-
vices in the recharger or plug the USB charging
cable into the USB jack of the respective device
and connect it to a regular USB port (computer,
laptop, USB power supply). The red charging sta-
tus LED is lit during recharge. The LED switches
off when the battery is fully loaded.
4.7 Group number selection
In the rare case of interference, changing the
group number can help. The following adjust-
ment has to be made on both the transmitter and
the receiver:
Switch the device off. Then press and hold both
the »
« and »
« buttons while switching the
device on.
The symbol „GRP« in the display will blink. Select
a group number of your choice between 00 and
39 by pressing the »
« and »
« buttons. After
the selection, wait for 5 seconds to set the chosen
group number. The »GRP«-symbol will stop blin-
king and the selected group number is displayed.
Please note:
There should only be one active transmitter within
a group! Additional activated transmitters with
the same group number will cause interference in
the sound quality. Transmitter and receiver must
be set to the same group number!
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