Abstract: The invention is a locking device for use with any electrical equipment or appliance or device having a cord and attached electrical plug, it encapsulates the plug end and is lockable such that the electrical device is disabled and can no longer be plugged into a power source. The invention includes a housing of two halves, hinged at one end, with the interior of the housing shaped and dimensioned to receive the electrical plug. The invention also includes a locking mechanism with two latches operable via a special key. The key has a shaft with two portions having differing widths and which are complementary to corresponding apertures in the latches. The invention is useful for controlling the use of electrical devices, for example, gaming consoles and television.