The Power Module

A Supercharger-like device that contains its own microprocessor along with an extra 6K of RAM.  Games are loaded via cassette but the Power Module also has a modem port to allow two players to connect directly to each other over the phone line for interactive play. It also includes a "unique programming procedure" that allows for 3-D games.  Other features included expanded sound capabilities and more complex graphics.  Packaged with two games: 3-D Ghost Attack and Depth Charge.