This may be a dumb question, but I can't find anything online or in the manual.

I have a PC 2.0 in a temp build (meaning crappy aux switch, sticking out the side). I noticed when the saber is awake but off, if I hold the aux button for about two seconds, it beeps. If I immediately release it, it beeps again lower. Any idea what this feature is? I'm at a loss...