Sennheiser M3AEBTXL Instruction Manual page 11

pulses red
pulses yellow
lights up green Rechargeable battery is fully charged
flashes red
If you do not have a USB power source with a USB-C socket,
use the USB adapter (supplied) for connection to a USB-A
socket.
Connecting the headphones to a Bluetooth device
In order to use the Bluetooth wireless connection, you must register both devices (headphones and
e.g. smartphone) once. This process is called pairing.
If your Bluetooth device supports auto pairing via NFC (Near Field Communication), the connection is
automatically established.
If your Bluetooth device does not support NFC, use the device settings for the pairing process.
If operation differs from the steps mentioned, also refer to the instruction manual of the Bluetooth
device you are using.
If you switch on the headphones for the first time, they auto-
matically go to pairing mode.
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 immediately after switch-on and are ready
for use.
When you switch the headphones on, they 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.
If you pair the headphones with the ninth Bluetooth device, the saved connection profile of the least
used Bluetooth device will be overwritten. If you want to re-establish a connection with the overwritten
Bluetooth device, you have to pair the headphones again.
Rechargeable battery is being charged
(charge level is very low)
Rechargeable battery is being charged
A charging error/battery error has
occurred (> Information on the built-in
rechargeable battery)
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