- All-new NXT Intelligent Brick with 32-bit microprocessor, more memory and FLASH - Three 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 - Four input ports, three output ports and seven 6-wire cords - Matrix display - Real Sound Speakers - USB 2.0 and Bluetooth support - Easy-to-use PC and Mac compatible interface - Intuitive, icon-based drag-and-drop program "building environment" - Requires 6 "AA" batteries