This medium sized diabolo comes equipped with 6 ultra bright LED lights. Three on each side, red, green and blue lights. Each side with it's own on off switch to save batteries during daylight play. These lights are bright and put on a really cool show in the dark. Cups are made of clear flexible and durable polycarbonate plastic; with aluminum inner hubs and a multi-piece metal axle. The light comes through in vivid colors!