To defend your desktop from unwanted visitors, all you need to do is install the software provided and plug in the USB Missile Launcher to the USB port on your notebook or desktop computer. To plan your attack, the direction and angle of launch can be adjusted to 45 degrees or a full 180 degrees rotation by either moving the arrows on your keyboard or moving the cursor of your mouse over the missile control pad found on your desktop. Then turn the volume up and FIRE! Your boss with think twice about dumping more work on you on once you bounce a foam missile off his forehead! (Missiles are completely harmless; you don't need to worry about causing any serious harm to your victims!) Shoots Up To 10 Feet! Includes: 3 Foam Missiles and A Target 4 Feet of USB Cord Prerecorded Sound Effects CD-ROM Software Minimum System Requirements: Intel Pentium II or AMD Athlon processor running at 2.66 MHz or Higher Windows XP 64 MB RAM USB 1.1 port