This is a replica of the necklace worn by Sam Flynn near the end of the movie "Tron: Legacy". Attached to the chain is the memory card onto which he downloaded a copy of the Tron world.
The chip is made of brass with nickel plating, with circuit-like details. There is a center hole where lights can shine through when the chip is placed on Sam's "hacker module".
Made by kevinericon on the RPF.
