LEGO Mindstorms NXT 2.0 (8547) (Discontinued by manufacturer) The intelligent NXT Lego brick features 32-bit microprocessor, a large matrix display Three interactive servo motors; four sensors(Ultrasonic Sensor, 2 Touch Sensors and the all-new Color Sensor) Color Sensor has triple functionality: Distinguishes colors and light settings, and functions as a lamp Easy-to-use software (PC and Mac) with icon-based drag-and-drop programming and 16 fun building and programming challenges Batteries not included with this product Building instructions for 4 new amazing robots Four input and 3 output ports, and Bluetooth and USB communication link