Color:Blue and red available. <br /><br />Battery:A battery 1 pcs(not included). <br /><br />Function: With light and sound.When it alarm,the trolley bus will drive along the edge of the table automatically,encounter angle will automatically turn around,will not fall down. <br /><br />China supplier: <br />Email : fangzhengcn@hotmail.com <br />Skype ID : chanceller819 <br />http://chinagift.en.ecplaza.net