[Good question. He hums a little at that.]

I guess not, but it's more convenient to use when it is. That place puts the interface at eye level and keeps it steady. It can also function as a translation device if you need it, so having it in your ear makes it easier to hear the audio.

[The shape of it doesn't seem practical for using it in your hand, but if she wants to try it that way he won't stop her.]