They both have a extension cord with a volume control built in. The X2 has a much shorter main than the XPRO as seen on the left in the photo's. Let me know if you have any more questions. Thanks
It really depends on how loud you have the volume. I usually have mine at a med-hi level so I can hear the music very well but still soft enough that I can tell if something ever does go wrong with my sled while it's running. They have a very clean sound with no distortion at high volume. I hope that helps.
The speakers themselves will not, however depending on your music device that may cause a problem.
I believe in the not so distant future as technology advance's we will see some battery-less bluetooth headsets soon. We are still keeping it simple for now without having to run multiple devices with multiple batteries. Like I said I believe there will be new technology to solve those problems soon.
X2 $49.99 X-PRO $79.99.
