I am confirming the operation. This item is only the main unit, without the box or power cord, and runs on four size-D batteries. This is Epoch's electronic game "Space Defender." It's a title from the "Digicom" series, which debuted in 1982. It uses an FL (fluorescent display tube) system, and the magnifying lens allowed for a powerful screen experience. It has a joystick and two buttons, and there were multiple game modes (5 patterns). Thank you for viewing.