Earlier there were bails, now there are Zings..!!! Experience the thrill of Zinging your friends at home... at school... in the backyard... at the beach, or even in the office when the boss and OH&S manager are in a meeting. Box includes two Zings that fit any set of stumps, and take 2AAA batteries per Zing. Get into it and light 'em up! This product is economical version designed for fun in the backyard with your kids and mates. The Zings Patented Electronic Cricket Wicket System seen on televised cricket. We want to contribute to Cricket by helping make third umpire decisions clear and simple and by enhancing the entertainment factor. A microprocessor in each Zing detects when BOTH spigots have become dislodged from the stump grooves. The Zing illuminates within 1/1000th of a second.