18. Does X5 3rd gen support in-line remote control from the headphone?

A: The X5 3rd gen supports the in-line remote control of the Apple-compatible CTIA standard. 
The supported operations are as follow:Volume Up/Down: click to turn up/down the volume by one step; hold to turn up/down the volume continously to Max volume/Silent mode 
(*Does not support in-line volume control from Apple Earpods)
Play / Pause: press main button once briefly to toggle between play and pause;
Next track: double-click main button quickly;
Previous track: triple-click main button quickly;

If you have encountered any problem with the in-line remote control, you can turn it off in Settings (Settings->Audio settings->In-line Remote)