4. Does the X1 support in-line remote controls on headphones?

A: Yes, the  X5 2nd gen/X3 2nd gen/X1  supports in-line remote controls on headphones with 3.5mm TRRS connectors conforming to the Apple standard（CTIA）.  On the other hand, if you find that the remote function fires incorrectly with incompatible headphones, you may turn the function off via the function menus.The supported operations are as follows:
Play / Pause: press the center button on the headphones once to pause playback or resume playback;
Next track: double-click the center button to skip to the next track;
Previous track: triple-click the center button to skip to the previous track
Fast forward: double-click the center button and hold the last click to fast forward;
Rewind: triple-click the center button and hold the last click to rewind.