Wireless playback quality
Its defaulted connection is from the highest Bluetooth codec to the lowest in turn when the M15 is
as a Bluetooth transmitter. You can choose the top supported codec from this option.
Notice: if it is stuck or in an unsteady state, try to switch to lower Bluetooth codec to make it more
stable.
Channel balance
If it is being biased, you can adjust the channel balance between the left and right channels. There
are 10 settings available.