Minimum System Requirements: Operating System: Windows XP or Mac 0510 CPU: Pentium II, 233 MHz RAM: 32 MB Available hard disk space: 115MB Mouse: Windows XP Compatible Sound: Sound Blaster 16 Windows Compatible Sound Device CD-ROM: CD 8x Video Display: 800 x 600 SVGA with 4 MB RAM Colors: 16 Bit USB Port: One available USB port for infrared transmitter Modem (Optional): 28.8 DBPS Internet browser (Optional): Netscape Navigator or Microsoft Internet. LEGO MINDSTORMS NXT includes: * All-new NXT Intelligent Brick with 32-bit microprocessor, more memory and FLASH * 3 Interactive Servo motors feature built-in rotation sensors to align speed for precise control * New sound sensor reacts to sound commands, patterns and tones * New ultrasonic visual sensor responds to movement * Improved touch sensor reacts to touch and release * Improved light sensor detects different colors and light intensities * 519 specially selected LEGO TECHNIC elements for sturdy and durable building and improved functionality and movement * 4 input ports, 3 output ports and 7 6-wire cords * Matrix display * Real sound speaker * USB 2.0 and Bluetooth support * Easy-to-use PC and Mac compatible interface * Intuitive, icon-based drag-and-drop program \\\"building\\\" environment