Answer:
I am an instrument you can hear but cannot touch or see. What am I?
I have branches but no fruit trunk or leaves. What am I?
What five-letter word has six left when two letters are removed?
What comes in many different sizes but is always only 1 foot long?
I stay where I am when I go off. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.