72 electronically changing contours automatically created by our patented breakthrough technology. Four 18-hole courses on two skill levels (2 Amateur and 2 Pro). Authentic Game Mode or challenging Practice Green Mode. Computerized keypad displays/announces player’s turn, hole number, penalty strokes, average putts-per-player, and even cheers for a hole-in-one. Built in 2′ extension for up to 8′ putts Wall outlet required Practice putting year round to build confidence and train your eye to read any green better than ever before. Entertain at Home or at the Office. Our customers tell us that the PUTTING CHALLENGE is more than just a golf putting aid – it is an interactive and fun addition to any home or office.