Illuminable sign for displaying a message in an automobile window

An illuminable sign, comprising:

• a translucent panel having an edge and a surface that is engraved with a message;
• an electrically powered light source positioned directly adjacent the edge of the translucent panel and oriented to direct light from the light source into the translucent sign element from the edge of the translucent panel;
• a first battery;
• an electrical switch having a first connection to the first battery and a second connection to the electrically powered light source, wherein the electrical switch is operable to selectively control the supply of electricity from the first battery to the electrically powered light source;
• a wireless receiver electrically connected to the electrical switch, wherein the wireless receiver generates an output signal that controls the operation of the electrical switch in response to receiving a wireless control signal;
• a frame member secured to the translucent panel along the edge of the translucent panel, wherein the frame member secures the electrically-power light source in position directly adjacent the edge of the translucent panel and orients the electrically powered light source to direct light into the translucent sign element from the edge of the translucent panel, and wherein the frame member further secures the first battery, the electrical switch and the wireless receiver;
• a first suction cup having a first head secured to the frame member and a first suction flange directed in a first direction that is generally perpendicular to the translucent panel;
• a second suction cup having a second head secured to the frame member and a second suction flange directed in the first direction;
• and
• a wireless transmitter unit including a housing, a second battery disposed within the housing, a wireless transmitter circuit disposed within the housing, and a button connected to the wireless transmitter circuit and accessible for manual actuation by a person, wherein manual actuation of the button causes the wireless transmitter circuit to transmit the wireless control signal to the wireless receiver, and wherein the engraved message is illuminated by the electrically-powered light source in response to manual actuation of the button.