YC0489B Spin the top and it will continue to spin without stopping An electromagnet will push the top out toward the edge when it reaches the center of the base Power Supply: 1 x 9 VOLT battery (included) A perfect gift for friends or children   Package Details Weight: 144.45 g Size: 10.00*10.00*4.5 cm Package Includes * Magnet Battery Powered Spinning Top