Putting the MM 450 into operation
8
Putting the MM 450 into operation
Charging the battery pack
̈ Before using the battery pack for the first time, charge it for at least
3hours.
When charging the battery pack outside the headset, the LED µ on the
battery pack lights up red. When the battery pack is fully charged, the
LED µ on the battery pack lights up green.
When the battery pack is almost flat, the Star LED ቢ on the headset
flashes red. You hear a short, negative acknowledgement tone.
The operating time of the battery pack depends on the device settings, the
listening situation and the audio sources used.
Possibilities of charging the battery pack
3h
µ
1
3s
Type of use Operating time
Using the headset with NoiseGard and Bluetooth technology 8 hours
Using the headset with NoiseGard only 20 hours
Using the headset with Bluetooth technology only 12 hours
Conserving the battery power
Remove the battery pack if the headset will not be used for
extended periods of time.
a
b
EU
UK
US
AU
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