Sennheiser HD 450BT Noise-Canceling Wireless Over-Ear Headphones (White) - Manual (Page 16)

Using the headphones
16 | HD 450BT
Switching the headphones on
1. Unfold both ear cups.
The joints click into place.
2. Press and hold the on/off button for 4 seconds.
The LED flashes red/blue. If Bluetooth is activated on the head-
phones, you hear the voice prompts “Power on” and “Device (1)
connected”.
If Bluetooth is deactivated on the headphones, you hear the voice
prompt “Power on”. If necessary, connect the audio cable to the
headphones.
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
4s
Hold
“Device (1)
connected“
“Power on“
ON