This stylish peg-style sensory chess computer is another superb travelling set Extended 128 playing levels to keep up with your improvement Powerful 32K Byte program on a RISC-Style processor Information-rich LCD shows how the computer is calculating, time for both sides, move count, moves under consideration, position evaluation, problem solving and main continuation Multiple-style openings library: Active, Passive, Tournament Your option of opening book playing modes: Complete Book or off Book Comprehensive coaching features which include 8 built-in classical mate studies 8 user-selectable end game playing modes for your choice of different playing styles One set of 4x AAA cells for great chess on the move or an optional 9V Adapter.