2. How to use the in-line control of the F5?
Pause/Play: Click the middle button once to pause/play music;
Next Track: Click the middle button briefly twice;
Previous Track: Click the middle button briefly three times;
Answer/Hang Up: Click the middle button once
Refuse: Hold the middle button
Adjust by clicking the Volume Up or Volume Down button
(*The F5 is MFi certified, so it can control the volume of the Apple iOS devices)