This Texas Instruments TI-99/4 Peripheral Expansion System Box is perfect for vintage computing collectors. It is compatible with Texas Instruments products and is being sold as untested. Whether you are looking for a nostalgic piece for your vintage computing collection or as a potential restoration project, this expansion system box is a great find. Its vintage condition adds to its charm and authenticity. Don't miss out on this rare opportunity to own a piece of computing history.

Plugs in and powers up. That's all I know