FlashFlight Meterorlight L.E.D. Light-up Dog Ball Fun exercise toy used for throwing and retrieving in a supervised setting (not a chew toy) Turn on and off by pressing and holding switch - will not turn off when bounced. Easily replaceable 2 x 2016 3V lithium battery included Made of extra durable rubber Available in 4 LED colors; Red, Blue, Green, Disc-O (LED cycles through the color spectrum)