NXT Intelligent Brick

The Intelligent Brick is the "brain" of the NXT. Amongst it's many features, it includes four ports for the four included sensors, and three for its included Servo Motors. There is a Matrix screen to navigate the uploaded programs, which can be added using either BluetoothTM or the USB 2.0 port on top. There are four buttons under the Matrix display. There are Grey "left" and "right" buttons, an Orange "select" button in the center, and a Grey "back" button under the "select" button.