Radio Shack model 2150 Chess Champion electronic chess computer. Excellent/near mint condition. Works perfectly. Runs on 6 "C" size batteries or included A/C adapter. 64 different levels to match your skill, including problem solving, and teaching levels. Moves very quickly, so you're not waiting for it to move. Shows current board and piece location on miniature electronic display and has a compartment in back to store included pieces when not in use. Very light and portable. Selling on eBay for $100.00+ Excellent for kids and adults alike, and very useful as a teaching tool.