EXCALIBUR ET477 Einstein Touch Backgammon. Enjoy the classic fun of backgammon in a whole new way. Introducing the new Einstein Pocket Backgammon. With this easy-to-hold and easy-touse unit, you can enjoy all the features and challenges of backgammon wherever you go. It has a ergonomic design and easy-to-see touch screen that makes it so easy to use. Stylus included.