The Gray Water Ops Smart Coin(TM) is protected by a US utility patent
Take your challenge coin to the next level with our patented NFC embedded challenge coins! We put a microchip / NFC chip in the center of the coin. Touch a smart phone to the coin and watch what happens!
This NFC crypto currency wallet uses Gray Water Ops NFC embedded challenge coin patent. Scan with any NFC enabled device and treat as cash!
