What's the remote/presenter used by the Apple speakers in WWDC 2013?

We all have seen the keynote or videos of the WWDC 2013; in the videos Tim Cook or the speaker use a remote/presenter for their keynote presentation and I would like to know if you can tell which one it is (brand, model) if not, can you recommend another?

*Note: it must support Keynote & Powerpoint for Mac.

Thanks!