This state-of-the-art programmable intelligent brick serves as the brain for LEGO® Education robots. The brick features four input ports for taking in data and three output ports for distributing the data as commanded. Students transfer their programs from the computer to the brick using a USB cable or Bluetooth technology. With on-brick programming and a 32-bit microprocessor, this intelligent brick is ready for anything students might create! The brick is powered by six AA batteries or the NXT Rechargeable DC Battery (979693), each sold separately.