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Using the headphones
16 | HD 458BT
Switching the headphones on
1. Unfold both ear cups.
The joints click into place.
2. Press and hold the on/off button for 2 seconds.
The LED flashes blue 3x. You hear the voice prompt “Power on”.
If Bluetooth is activated on the headphones and a paired device is
available, the LED flashes blue 3x and you hear the voice prompt
“Connected”.
If Bluetooth is deactivated on the headphones(> 25), you hear the
voice prompt “Power on” and the active noise cancellation ANC
may be activated
(> 20).
WARNING
Danger of hearing damage due to high volume levels!
Listening at high volume levels can lead to permanent
hearing defects.
▷ Before putting the headphones on, adjust the volume
to a low level (> 19).
▷ Do not continuously expose yourself to high volume
levels.
Make sure that Bluetooth is already activated on your Blue-
tooth device when switching on the headphones.
If Bluetooth is activated and the headphones cannot find a
paired Bluetooth device within a few minutes, you hear the
voice prompt “Lost connection”. The LED flashes red 3x. The
headphones switch to standby mode.
1 2
2s
Hold
“Power on“
“Connected“
ON
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