This super cool dice are a matte black until you shake or roll them - they have an action activated led light that blinks various colors for approximately 10 seconds after you roll them. 

Light is active for up to 10 total hours or up to 3,000 rolls!

Perfect for Role Playing Games like Dungeons and Dragons (D&D) , Shadowrun, Pathfinder, Warhammer, fantasy, sci-fi, or party games.