This fantastic putting practice system rewards natural strokes at the proper speed. Its regulation-size "hole" is nearly flat in front so — unlike competing systems — you don't hammer the ball to get it in. Realism is further enhanced with edges that deflect off-line putts that would not fall into a real hole, either! Electronic "applause" or "ball dropping into hole" (mutable) celebrates a successful putt and the ball shoots back to you automatically. PuttRunner® is cordless and portable. Measures 1 1/4" x 4 1/4" x 4 1/2"; it weighs only 8 oz. Travel case included. Runs on 4 AAA batteries (not included).