While you're waiting for your iPhone 4S to charge in the dock (he didn't make it iPhone 5 compatible!), there's a headphone jack so you can listen to some tunes, as well as a USB jack in case your phone is up to date. If a production version makes it to the marketplace, we're hoping for some iPhone 6 compatibility.
However, skating over your phone could be a terrible idea.
Ethan Wolff-Mann is an editor at Supercompressor. He cannot skateboard very well. Follow him on Twitter @ewolffmann.