An electronic device is provided that functions as an area-intrusion informing embodiment for announcing the unauthorized entry into an enclosure or area which has at least one access opening and closing means. The base member is provided with a plurality of drainage holes spaced adjacent the bottom surface and further includes a plurality of drainage plugs removably insertable into the drain holes. A pair of siderails are operably connected to the third deck section of the bed. The large mass wheel may be further connected to at least one driven wheel, whereby the rotation of the large mass wheel provides a primary motive power source for a vehicle. It can be used together with HFC refrigerants and natural refrigerants such as carbon dioxide and hydrocarbons, to provide a satisfactory balance between all of the properties of lubricity, miscibility with refrigerants, heat and hydrolytic stability and electric insulating property. The invention also discloses a method for providing a precise visual stimulus for any environment.