The ThinkPad Helix Ultrabook Pro Keyboard is a thin, custom fit keyboard for ThinkPad Helix. With a built-in rechargeable battery, ThinkPad Helix Ultrabook Pro Keyboard extends system battery life up to 12 hrs. A custom designed hinge connects the table to the keyboard and provides the ideal viewing angle for maximum productivity. The keyboard also includes a built-in track pad along with the traditional ThinkPad track point to provide users a tactile way to manage and use legacy office programs and other applications. The keyboard supports two user modes: notebook mode, and tablet mode.Built-in 5 buttons track pad