Answer:
Many have heard it, but nobody has ever seen it. It will not speak until spoken to. What is it?
What is weightless but takes two people to hold it?
The man who invented it doesn't want it. The man who bought it doesn't need it. The man who needs it doesn't know it. What is it?
What stays the same size no matter how much they weight?
I am so simple that I can only point. Yet I guide men all over the world.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?