The Explorer Pro electronic chess computer offers a selection of features for Beginners to Accomplished players. The Explorer Pro has 64 playing levels including Tournament and Blitz. There is a Coach Mode, Tactical Alerts, Capture Warnings, hints and a 50 move take back feature designed to make you a better Chess player. Unfinished games can be saved in memory for later play. The Explorer Pro includes an AC adapter but can also be used with 4 AA batteries. Batteries not included.