Driving LED Emoticon

The Driving LED Emoticon is a battery powered, wirelessly controlled message sign that can be attached to the rear window of your car via the included suction cup. A remote control unit is kept in the front of the car (fixed to front window, dash, or laid in a storage compartment) to activate the messages by pressing one of its buttons. It can display any one of five different messages - smiling face, frowning face, "Thanks", "Back Off" and "Idiot".

more info click here