The Meehoo with an Exactlywatt

Knock knock!
Who's there?
Me!
Me who?
That's right!
What's right?
Meehoo!
That's what I want to know!
What's what you want to know?
Me, who?
Yes, exactly!
Exactly what?
Yes, I have an Exactlywatt on a chain!
Exactly what on a chain?
Yes!
Yes what?
No, Exactlywatt!
That's what I want to know!
I told you - Exactlywatt!
Exactly what?
Yes!
Yes what?
Yes, it's with me!
What's with you?
Exactlywatt - that's what's with me.
Me who?
Yes!
Go away!
Knock knock...