When you send an iMessage from an iPod to an iPhone, what does it look like?

I recently just bought the new iPod touch, 5th generation. I set up iMessage. If I send a message to one of my friends using iMessage to their iPhone, how does it appear on their screen? Like does it say it's from my email address? Or is it already under my contact #? (I don't have an iPhone) haha thanks for helping out!

How can you send message from ipod to iphone