Double-click the left ear earphone, volume down, double-click the right ear headphones, the volume increase. Each one will be prompted to add a "beep", when added to maximum volume will be prompted to "beep."
The left ear headphones press twice, the volume decreases, the right ear headphones press twice, the volume increases. A "beep" is prompted every time, and a "beep" when added to the maximum volume.
Press the left earphone twice to decrease the volume, and press the right earphone twice to increase the volume. Every time it is added, it will prompt "beep". When it is added to the maximum volume, it will prompt "beep".<br>