Putting Challenge Ultimate Edition 72 electronically changing contours automatically created by our patented breakthrough technology Finest, most true to life putting surface rolls at a 9.5 stimpmeter Patented sensor system keeps score of every 1 , 2 , or 3 putt for up to 4 players on 9 or 18 holes Computerized keypad displaysannounces player's turn, hole number, penalty strokes, average putts per player, and even cheers for a hole in one If you have any questions about this product or would like to order by phone, please call us Toll Free at 888 733 8383. We look forward to hearing from you!