A Quantum Leap in Video Game Technology. XONOX Double-Ender plugs in at both ends and contains two completely different game chips, each with 8K of memory. So with Double-Ender, it's a whole new game! Hi-res graphics. Multiple game screens. Challenging play action. Time clock tension. New surprises in each game. And a new game in each end! XONOX Double-Ender... twice the fun for the price of one!