![background image](http://html.mh-extra.com/html/sennheiser/cx-120-bt/cx-120-bt_instruction-manual_1240204010.webp)
Using the headphones
10 | CX 120BT
Information on the Bluetooth wireless
connection
The headphones are compatible with Bluetooth 4.2.
If your audio source supports aptX audio encoding, music is auto-
matically played in high audio quality: 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.
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.
If you switch on the headphones for the first time, they auto-
matically switch to pairing mode.
Paired and connected Bluetooth device
Paired Bluetooth device (currently not connected)