QCY T1 User Manual page 28

FAQ
Can the headphones be connected individually?
You can also use the headphones individually. Please use only the left earphone and leave
the right one in the case. This will disconnect the stereo mode. The left earphone will then
be displayed in the Bluetooth settings of your smartphone as "QCY-T1_L".
The headphones try to connect in the charging case
If the headphones do not turn o automatically when you put them back in the charging
box, you can switch them o manually. Press the QCY buttons on both headphones for
about two seconds.
The headphones can remain in the charging box.