The robot's "brain!"

The all-new NXT Intelligent Brick, your robot’s “brain,” features a powerful 32-bit microprocessor and Flash memory, plus support for Bluetooth™ and USB 2.0! The NXT intelligent Brick includes:

• 32-bit ARM7 microprocessor.
• Support for Bluetooth wireless communication.
• 1 USB 2.0 port.
• 4 input ports.
• 3 output ports.
• Powered by 6 AA (1.5v) Batteries, not included, or lithium Rechargeable Battery (#9798), sold separately.
• Up to three NXT Bricks can be connected at the same time; however, you can only communicate with one NXT Brick at a time.
• This is the individual component, and does not include any sensors, motors, cords, software or other accessories; for the complete LEGO® MINDSTORMS® NXT set, please see item #8527 or #8547.