Our bus driver was tricky. He always used to fool us. He'd do magic tricks while driving every morning on the school bus. He would have handed out blinkies. I would have made a bet. But back then a flashing schoolbus hadn't been invented yet. Specifications: Height: 1.0 in. Width: 1.9 in. LED Colors: 1 Blue, 1 Red, 3 Yellow Batteries: Includes 2 CR927 BatteriesBatteries for this item are replaceable