Also the Logitech G15 Has:
Installation CD with GamePanel software
256 MB RAM 
User Guide
20 MB of available hard disk space 
One-year limited warranty
CD-ROM drive
USB port
Logitech® GamePanel™ LCD requires software that supports GamePanel technology.

Ruben Mookerjee Of Logitech Says:

“PC gamers are continuously tweaking their systems to achieve peak
performance and enhanced speed for that added edge to defeat an opponent. The Logitech G15 keyboard offers gamers unmatched levels of
programmability, giving them a tactical edge in their quest to dominate. Also, the built-in LCD display provides game developers with a whole new way to
display critical game information without distracting from the game itself.”

Logitech Goes On To Say:

Logitech´s first-of-its-kind LCD display will be supported by several new
games later this year, providing game information such as score, times, health
status, and ammunition levels. Out of the box, the LCD panel can be programmed
to show information from other applications, such as incoming email alerts, CPU
speed, or even media player information, without interfering with the game on
screen. A software development kit (SDK) will be included on the installation
CD, allowing gamers to write their own programs for customized information to be
displayed on the LCD screen. When not in use, the LCD panel folds down to
protect the screen and offers maximum portability — perfect for transporting to
a gaming session at a friend´s house.

The LCD and Logitech´s gaming keyboard software also help make it easy for
gamers to set up custom macro commands, which combine multiple keystrokes into
one button press without leaving the game. On the left side of the Logitech G15
keyboard, gamers will find 18 fully programmable keys, called the G keys, and
three mode keys: M1, M2, and M3. Within each mode, each G key can be programmed
to represent a different keystroke or macro, meaning a total of 54 different
commands that can be customized. For example, this means that World of Warcraft®
players can program the G keys to access their spells more efficiently.
Different combinations of keys can be programmed for every game and the G15 will
default to these game-specific settings when the title is launched.

By installing Logitech´s software drivers, the LCD will also display media
information such as track names and times while music is playing on a PC. Below
the LCD, the keyboard features convenient media controls that make it easy to
control volume during game play or to control playlists and tracks while
listening to music.

The Logitech G15 keyboard also features backlit keys — when backlighting is
turned on, a light from underneath the key illuminates the character on top of
the key. A button on the keyboard turns on the backlighting with two possible
brightness levels, providing easy viewing in any lighting condition — including
late-night gaming marathons.

The keyboard has two full-speed USB ports built in, making it easy to plug in
a mouse, a headset or another peripheral, without filling up all the ports on
the PC. The keyboard also features a gaming mode switch, which, when turned on,
disables the Windows® key so gamers won´t get dropped out of a game if they
accidentally press it.