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.
Recharge as necessary by putting the dice back in the case; make sure the two bronze pads are on the matching pads in the case.
These dice are plastic and very lightweight.
Contains: 7 polyhedral dice - D4, D6, D8, D10, D%, D12, D20 dice
Material: Hollow Plastic with a LED assembly inside