Instruction manual

Using the headphones
12 | HD 450SE
Connecting the headphones to a
Bluetooth device
To be able to use the Bluetooth connection, you must register both
devices (headphones and e.g. smartphone) once. This process is
called pairing.
If operation differs from the steps mentioned, also refer to the
instruction manual of the Bluetooth device you are using.
Information on the Bluetooth wireless
connection
The headphones are compatible with Bluetooth 5.0.
If your audio source supports one of the following high-resolution
audio encoding methods, music is automatically played in high audio
quality: aptX, aptX LL or AAC. Otherwise the headphones will play
your music in normal audio quality (SBC).
Paired devices establish the Bluetooth wireless connection immedi-
ately after switch-on and are ready for use.
On switch-on, the headphones automatically try to connect to the
last two connected Bluetooth devices. The headphones can save the
connection profiles of up to eight Bluetooth devices with which they
have been paired. Audio playback is only possible from one device at
a time.
If you pair the headphones with the ninth Bluetooth device, the saved
connection profile of the least used Bluetooth device will be over
-
written. If you want to re-establish a connection with the overwritten
Bluetooth device, you have to pair the headphones again.
LED Meaning
lights up red Rechargeable battery is being charged
flashes blue
for 5 minutes,
the LED then
goes off
Rechargeable battery is fully charged
If the LED does not light up immediately during charging, clean
the charging socket and charge the headphones until the LED
lights up again (>
11).
You can speed up the charging process by charging the head-
phones when they are switched off.
for 5 min
LED Off
When you switch on the headphones for the first time, they
automatically switch to pairing mode.