ResponseCard RF

The ResponseCard RF from TurningPoint is used in college classrooms to take attendance, conduct quizzes and polls, and other interactive activities. They are known as "clickers" because students click buttons on them. With all the geeky students around, it was inevitable that some would figure out ways to hack the things.

Links

 * Official site
 * US Patent 7,330,716
 * Article on hacking the clicker