Sennheiser MM400 Instruction Manual download pdf (Page 9)

Putting the MM 400-X into operation

8 | MM 400-X

Putting the MM 400-X into operation

왘 Before using the MM 400-X for the first time, remove the protection

strip from the battery pack.

Charging the battery pack

왘 Before using the battery pack for the first time, charge it for at least

3 hours. The battery pack can also be charged inside the headset

during operation.

When charging the battery pack, the LED 쐊 on the battery pack lights up

red. When the battery pack is fully charged, the LED 쐊 on the battery pack

lights up green.

When the battery pack is almost flat, the LED 1 flashes red. You hear a

short, descending acknowledgement tone.

The operating time of the battery pack depends on the device settings, the

listening situation and the audio sources used.

쐊

Type of use Operating time

Bluetooth technology 10 hours

Remove the battery pack if the headset will not be used for

extended periods of time.

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Sennheiser MM400 Instruction Manual Page 9