Unopened item, but there are stains on the package. Operation not confirmed. Batteries not included, so there is no risk of leakage. Monopoly using a circular board. No paper money is used; instead, credit cards and electronic devices are used in combination. The electronic device replaces the Chance cards and plays sound effects and music as the game progresses. The package size is approximately 40cm x 27cm x 6cm. Will be shipped via Takkyubin (courier service).