USB hub is located at the back of the keyboard. Images are courtesy of PC Watch. Microsoft Internet Keyboard Pro 19 buttons on the keyboards are programmable and most of the presets are used for Internet browsing. I can barely read some Chinese characters on the keyboards. Some of them are refresh, stop, search, etc.
Volume controls are also part of the keyboard design.
Microsoft Internet Keyboard Pro is scheduled to be released in year 2000. Both keyboards will come with Microsoft IntelliType Pro for keyboard customization. It's pretty similar to the Keyboard Pro except the fact the non-Pro version has a smaller design and fewer buttons. I don't know Japanese. It's the best I can do to translate the article.