A:AnswerSounds like yours is defective. You can connect it to a P.C. and run the sound engine app to tweak things although as far as I can see there's no opition for doing things like turning off the mic light on this particular model.
A:AnswerYes on the other hand doesn't give too much slack for adjustment. It is already set at the length for the biggest head right out the box so can only be adjusted for smaller heads.