What is this little screen in front of the President?

I’ve seen it in other places as well, but in this picture it’s really clear to see. What is this screen used for? Is it for a teleprompter of some sort? If so, how does it work?

Yes, it’s the TelePrompTer. It is a semi-reflective surface, and the image is reflected from a projector at it’s base.

ETA: here’s a picture of the whole gadget: newspaper.li

Yes, it’s a teleprompter that reflects the text from a computer screen or similar.

Like this.

Thank you, you guys are awesome and wicked fast!